# Svelte changelog

## 3.58.0

- Add `bind:innerText` for `contenteditable` elements ([#3311](https://github.com/sveltejs/svelte/issues/3311))
- Add support for CSS `@container` queries ([#6969](https://github.com/sveltejs/svelte/issues/6969))
- Respect `preserveComments` in DOM output ([#7182](https://github.com/sveltejs/svelte/pull/7182))
- Allow use of `document` for `target` in typings ([#7554](https://github.com/sveltejs/svelte/pull/7554))
- Add `a11y-interactive-supports-focus` warning ([#8392](https://github.com/sveltejs/svelte/pull/8392))
- Fix equality check when updating dynamic text ([#5931](https://github.com/sveltejs/svelte/issues/5931))
- Relax `a11y-no-noninteractive-element-to-interactive-role` warning ([#8402](https://github.com/sveltejs/svelte/pull/8402))
- Properly handle microdata attributes ([#8413](https://github.com/sveltejs/svelte/issues/8413))
- Prevent name collision when using computed destructuring variables ([#8417](https://github.com/sveltejs/svelte/issues/8417))
- Fix escaping `<textarea value={...}>` values in SSR ([#8429](https://github.com/sveltejs/svelte/issues/8429))

## 3.57.0

- Add `<svelte:document>` ([#3310](https://github.com/sveltejs/svelte/issues/3310))
- Add a11y `no-noninteractive-element-to-interactive-role` ([#8167](https://github.com/sveltejs/svelte/pull/8167))
- Stop intro transition from triggering incorrectly ([#6152](https://github.com/sveltejs/svelte/issues/6152), [#6812](https://github.com/sveltejs/svelte/issues/6812))
- Support computed and literal properties when destructuring objects in the template ([#6609](https://github.com/sveltejs/svelte/issues/6609))
- Give `style:` directive precedence over `style=` attribute ([#7475](https://github.com/sveltejs/svelte/issues/7475))
- Select `<option>` with `selected` attribute when initial state is `undefined` ([#8361](https://github.com/sveltejs/svelte/issues/8361))
- Prevent derived store callbacks after store is unsubscribed from ([#8364](https://github.com/sveltejs/svelte/issues/8364))
- Account for `bind:group` members being spread across multiple control flow blocks ([#8372](https://github.com/sveltejs/svelte/issues/8372))
- Revert buggy reactive statement optimization ([#8374](https://github.com/sveltejs/svelte/issues/8374))
- Support CSS units in the `fly` and `blur` transitions ([#7623](https://github.com/sveltejs/svelte/pull/7623))

## 3.56.0

- Add `|stopImmediatePropagation` event modifier ([#5085](https://github.com/sveltejs/svelte/issues/5085))
- Add `axis` parameter to `slide` transition ([#6182](https://github.com/sveltejs/svelte/issues/6182))
- Add `readonly` utility to convert `writable` store to readonly ([#6518](https://github.com/sveltejs/svelte/pull/6518))
- Add `readyState` binding for media elements ([#6666](https://github.com/sveltejs/svelte/issues/6666))
- Generate valid automatic component names when the filename contains only special characters ([#7143](https://github.com/sveltejs/svelte/issues/7143))
- Add `naturalWidth` and `naturalHeight` bindings ([#7771](https://github.com/sveltejs/svelte/issues/7771))
- Support `<!-- svelte-ignore ... -->` on components ([#8082](https://github.com/sveltejs/svelte/issues/8082))
- Add a11y warnings:
  - `aria-activedescendant-has-tabindex`: checks that elements with `aria-activedescendant` have a `tabindex` ([#8172](https://github.com/sveltejs/svelte/pull/8172))
  - `role-supports-aria-props`: checks that the (implicit) element role supports the given aria attributes ([#8195](https://github.com/sveltejs/svelte/pull/8195))
- Add `data-sveltekit-replacestate` and `data-sveltekit-keepfocus` attribute typings ([#8281](https://github.com/sveltejs/svelte/issues/8281))
- Compute node dimensions immediately before crossfading ([#4111](https://github.com/sveltejs/svelte/issues/4111))
- Fix potential infinite invalidate loop with `<svelte:component>` ([#4129](https://github.com/sveltejs/svelte/issues/4129))
- Ensure `bind:offsetHeight` updates initially ([#4233](https://github.com/sveltejs/svelte/issues/4233))
- Don't set selected options if value is unbound or not passed ([#5644](https://github.com/sveltejs/svelte/issues/5644))
- Validate component `:global()` selectors ([#6272](https://github.com/sveltejs/svelte/issues/6272))
- Improve warnings:
  - Make `noreferrer` warning less zealous ([#6289](https://github.com/sveltejs/svelte/issues/6289))
  - Omit a11y warnings on `<video aria-hidden="true">` ([#7874](https://github.com/sveltejs/svelte/issues/7874))
  - Omit a11y warnings on `<svelte:element>` ([#7939](https://github.com/sveltejs/svelte/issues/7939))
  - Detect unused empty attribute CSS selectors ([#8042](https://github.com/sveltejs/svelte/issues/8042))
  - Omit "no child content" warning on elements with `aria-label` ([#8296](https://github.com/sveltejs/svelte/issues/8296))
- Check value equality for `<input type="search">` and `<input type="url">` ([#7027](https://github.com/sveltejs/svelte/issues/7027))
- Do not select a disabled `<option>` by default when the initial bound value is undefined ([#7041](https://github.com/sveltejs/svelte/issues/7041))
- Handle `{@html}` tags inside `<template>` tags ([#7364](https://github.com/sveltejs/svelte/pull/7364))
- Ensure `afterUpdate` is not called after `onDestroy` ([#7476](https://github.com/sveltejs/svelte/issues/7476))
- Improve handling of `inert` attribute ([#7500](https://github.com/sveltejs/svelte/issues/7500))
- Reduce use of template literals in SSR output for better performance ([#7539](https://github.com/sveltejs/svelte/pull/7539))
- Ensure `<input>` value persists when swapping elements with spread attributes in an `{#each}` block ([#7578](https://github.com/sveltejs/svelte/issues/7578))
- Simplify generated code for reactive statements if dependencies are all static ([#7942](https://github.com/sveltejs/svelte/pull/7942))
- Fix race condition on `<svelte:element>` with transitions ([#7948](https://github.com/sveltejs/svelte/issues/7948))
- Allow assigning to a property of a `const` when destructuring ([#7964](https://github.com/sveltejs/svelte/issues/7964))
- Match browser behavior for decoding malformed HTML entities ([#8026](https://github.com/sveltejs/svelte/issues/8026))
- Ensure `trusted-types` CSP compatibility for Web Components ([#8134](https://github.com/sveltejs/svelte/issues/8134))
- Optimise `<svelte:element>` output code for static tag and static attribute ([#8161](https://github.com/sveltejs/svelte/pull/8161))
- Don't throw when calling unsubscribing from a store twice ([#8186](https://github.com/sveltejs/svelte/pull/8186))
- Clear inputs when `bind:group` value is set to `undefined` ([#8214](https://github.com/sveltejs/svelte/issues/8214))
- Fix handling of nested arrays with keyed `{#each}` containing a non-keyed `{#each}` ([#8282](https://github.com/sveltejs/svelte/issues/8282))

## 3.55.1

- Fix `draw` transition with delay showing a dot at the beginning of the path ([#6816](https://github.com/sveltejs/svelte/issues/6816))
- Fix infinity runtime call stack when propagating bindings ([#7032](https://github.com/sveltejs/svelte/issues/7032))
- Fix static `<svelte:element>` optimization in production mode ([#7937](https://github.com/sveltejs/svelte/issues/7937))
- Fix `svelte-ignore` comment breaking named slot ([#8075](https://github.com/sveltejs/svelte/issues/8075))
- Revert change to prevent running init binding unnecessarily ([#8103](https://github.com/sveltejs/svelte/issues/8103))
- Fix adding duplicate event listeners with `<svelte:element on:event>` ([#8129](https://github.com/sveltejs/svelte/issues/8129))
- Improve detection of promises that are also functions ([#8162](https://github.com/sveltejs/svelte/pull/8162))
- Avoid mutating spread component props during SSR ([#8171](https://github.com/sveltejs/svelte/issues/8171))
- Add missing typing for global `part` attribute ([#8181](https://github.com/sveltejs/svelte/issues/8181))
- Add missing `submitter` property to `on:submit` event type

## 3.55.0

- Add `svelte/elements` for HTML/Svelte typings ([#7649](https://github.com/sveltejs/svelte/pull/7649))

## 3.54.0

- Pass `options.direction` argument to custom transition functions ([#3918](https://github.com/sveltejs/svelte/issues/3918))
- Support fallback a11y WAI-ARIA roles ([#8044](https://github.com/sveltejs/svelte/issues/8044))
- Prevent running init binding unnecessarily ([#5689](https://github.com/sveltejs/svelte/issues/5689), [#6298](https://github.com/sveltejs/svelte/issues/6298))
- Allow updating variables from `@const` declared function ([#7843](https://github.com/sveltejs/svelte/issues/7843))
- Do not emit `a11y-no-noninteractive-tabindex` warning if element has a `tabpanel` ([#8025](https://github.com/sveltejs/svelte/pull/8025))
- Fix escaping SSR'd values in `style:` directive ([#8085](https://github.com/sveltejs/svelte/issues/8085))

## 3.53.1

- Fix exception in `rel=` attribute check with dynamic values ([#7994](https://github.com/sveltejs/svelte/issues/7994))
- Do not emit deprecation warnings for `css` compiler options for now ([#8009](https://github.com/sveltejs/svelte/issues/8009))
- Make compiler run in browser again ([#8010](https://github.com/sveltejs/svelte/issues/8010))
- Upgrade `tslib` ([#8013](https://github.com/sveltejs/svelte/issues/8013))

## 3.53.0

- Check whether `parentNode` exists before removing child ([#6037](https://github.com/sveltejs/svelte/issues/6037))
- Upgrade various dependencies, notably `css-tree` to `2.2.1` ([#7572](https://github.com/sveltejs/svelte/pull/7572), [#7982](https://github.com/sveltejs/svelte/pull/7982))
- Extend `css` compiler option with `'external' | 'injected' | 'none'` settings and deprecate old `true | false` values ([#7914](https://github.com/sveltejs/svelte/pull/7914))

## 3.52.0

- Throw compile-time error when attempting to update `const` variable ([#4895](https://github.com/sveltejs/svelte/issues/4895))
- Warn when using `<a target="_blank">` without `rel="noreferrer"` ([#6188](https://github.com/sveltejs/svelte/issues/6188))
- Support `style:foo|important` modifier ([#7365](https://github.com/sveltejs/svelte/issues/7365))
- Fix hydration regression with `{@html}` and components in `<svelte:head>` ([#7941](https://github.com/sveltejs/svelte/pull/7941))

## 3.51.0

- Add a11y warnings:
  - `a11y-click-events-have-key-events`: check if click event is accompanied by key events ([#5073](https://github.com/sveltejs/svelte/pull/5073))
  - `a11y-no-noninteractive-tabindex`: check for tabindex on non-interactive elements ([#6693](https://github.com/sveltejs/svelte/pull/6693))
- Warn when two-way binding to `{...rest}` object in `{#each}` block ([#6860](https://github.com/sveltejs/svelte/issues/6860))
- Support `--style-props` on `<svelte:component>` ([#7461](https://github.com/sveltejs/svelte/issues/7461))
- Supports nullish values for component event handlers ([#7568](https://github.com/sveltejs/svelte/issues/7568))
- Supports SVG elements with `<svelte:element>`([#7613](https://github.com/sveltejs/svelte/issues/7613))
- Treat `inert` as boolean attribute ([#7785](https://github.com/sveltejs/svelte/pull/7785))
- Support `--style-props` for SVG components ([#7808](https://github.com/sveltejs/svelte/issues/7808))
- Fix false positive dev warnings about unset props when they are bound ([#4457](https://github.com/sveltejs/svelte/issues/4457))
- Fix hydration with `{@html}` and components in `<svelte:head>` ([#4533](https://github.com/sveltejs/svelte/issues/4533), [#6463](https://github.com/sveltejs/svelte/issues/6463), [#7444](https://github.com/sveltejs/svelte/issues/7444))
- Support scoped style for `<svelte:element>` ([#7443](https://github.com/sveltejs/svelte/issues/7443))
- Improve error message for invalid value for `<svelte:component this={...}>` ([#7550](https://github.com/sveltejs/svelte/issues/7550))
- Improve error message when using logic blocks or tags at invalid location ([#7552](https://github.com/sveltejs/svelte/issues/7552))
- Warn instead of throwing error if `<svelte:element>` is a void tag ([#7566](https://github.com/sveltejs/svelte/issues/7566))
- Supports custom elements in `<svelte:element>` ([#7733](https://github.com/sveltejs/svelte/issues/7733))
- Fix calling component unmount if a component is mounted and then immediately unmounted ([#7817](https://github.com/sveltejs/svelte/issues/7817))
- Do not generate `a11y-role-has-required-aria-props` warning when elements match their semantic role ([#7837](https://github.com/sveltejs/svelte/issues/7837))
- Improve performance of custom element data setting in `<svelte:element>` ([#7869](https://github.com/sveltejs/svelte/pull/7869))

## 3.50.1

- Add all global objects and functions as known globals ([#3805](https://github.com/sveltejs/svelte/issues/3805), [#7223](https://github.com/sveltejs/svelte/issues/7223))
- Fix regression with style manager ([#7828](https://github.com/sveltejs/svelte/issues/7828))

## 3.50.0

- Add a11y warnings:
  - `a11y-incorrect-aria-attribute-type`: check ARIA state and property values ([#6978](https://github.com/sveltejs/svelte/pull/6978))
  - `a11y-no-abstract-role`: check that ARIA roles are non-abstract ([#6241](https://github.com/sveltejs/svelte/pull/6241))
  - `a11y-no-interactive-element-to-noninteractive-role`: check for non-interactive roles used on interactive elements ([#5955](https://github.com/sveltejs/svelte/pull/5955))
  - `a11y-role-has-required-aria-props`: check that elements with `role` attribute have all required attributes for that role ([#5852](https://github.com/sveltejs/svelte/pull/5852))
- Add `ComponentEvents` convenience type ([#7702](https://github.com/sveltejs/svelte/pull/7702))
- Add `SveltePreprocessor` utility type ([#7742](https://github.com/sveltejs/svelte/pull/7742))
- Enhance action typings ([#7805](https://github.com/sveltejs/svelte/pull/7805))
- Remove empty stylesheets created from transitions ([#4801](https://github.com/sveltejs/svelte/issues/4801), [#7164](https://github.com/sveltejs/svelte/issues/7164))
- Make `a11y-label-has-associated-control` warning check all descendants for input control ([#5528](https://github.com/sveltejs/svelte/issues/5528))
- Only show lowercase component name warnings for non-HTML/SVG elements ([#5712](https://github.com/sveltejs/svelte/issues/5712))
- Disallow invalid CSS selectors starting with a combinator ([#7643](https://github.com/sveltejs/svelte/issues/7643))
- Use `Node.parentNode` instead of `Node.parentElement` for legacy browser support ([#7723](https://github.com/sveltejs/svelte/issues/7723))
- Handle arrow function on `<slot>` inside `<svelte:fragment>` ([#7485](https://github.com/sveltejs/svelte/issues/7485))
- Improve parsing speed when encountering large blocks of whitespace ([#7675](https://github.com/sveltejs/svelte/issues/7675))
- Fix `class:` directive updates in aborted/restarted transitions ([#7764](https://github.com/sveltejs/svelte/issues/7764))

## 3.49.0

- Improve performance of string escaping during SSR ([#5701](https://github.com/sveltejs/svelte/pull/5701))
- Add `ComponentType` and `ComponentProps` convenience types ([#6770](https://github.com/sveltejs/svelte/pull/6770))
- Add support for CSS `@layer` ([#7504](https://github.com/sveltejs/svelte/issues/7504))
- Export `CompileOptions` from `svelte/compiler` ([#7658](https://github.com/sveltejs/svelte/pull/7658))
- Fix DOM-less components not being properly destroyed ([#7488](https://github.com/sveltejs/svelte/issues/7488))
- Fix `class:` directive updates with `<svelte:element>` ([#7521](https://github.com/sveltejs/svelte/issues/7521), [#7571](https://github.com/sveltejs/svelte/issues/7571))
- Harden attribute escaping during SSR ([#7530](https://github.com/sveltejs/svelte/pull/7530))

## 3.48.0

- Allow creating cancelable custom events with `createEventDispatcher` ([#4623](https://github.com/sveltejs/svelte/issues/4623))
- Support `{@const}` tag in `{#if}` blocks [#7241](https://github.com/sveltejs/svelte/issues/7241)
- Return the context object in `setContext` [#7427](https://github.com/sveltejs/svelte/issues/7427)
- Allow comments inside `{#each}` blocks when using `animate:` ([#3999](https://github.com/sveltejs/svelte/issues/3999))
- Fix `|local` transitions in `{#key}` blocks ([#5950](https://github.com/sveltejs/svelte/issues/5950))
- Support svg namespace for `{@html}` ([#7002](https://github.com/sveltejs/svelte/issues/7002), [#7450](https://github.com/sveltejs/svelte/issues/7450))
- Fix `{@const}` tag not working inside a component when there's no `let:` [#7189](https://github.com/sveltejs/svelte/issues/7189)
- Remove extraneous leading newline inside `<pre>` and `<textarea>` ([#7264](https://github.com/sveltejs/svelte/issues/7264))
- Fix erroneous setting of `textContent` for `<template>` elements ([#7297](https://github.com/sveltejs/svelte/pull/7297))
- Fix value of `let:` bindings not updating in certain cases ([#7440](https://github.com/sveltejs/svelte/issues/7440))
- Fix handling of void tags in `<svelte:element>` ([#7449](https://github.com/sveltejs/svelte/issues/7449))
- Fix handling of boolean attributes in `<svelte:element>` ([#7478](https://github.com/sveltejs/svelte/issues/7478))
- Add special style scoping handling of `[open]` selectors on `<dialog>` elements ([#7495](https://github.com/sveltejs/svelte/issues/7494))

## 3.47.0

- Add support for dynamic elements through `<svelte:element>` ([#2324](https://github.com/sveltejs/svelte/issues/2324))
- Miscellaneous variable context fixes in `{@const}` ([#7222](https://github.com/sveltejs/svelte/pull/7222))
- Fix `{#key}` block not being reactive when the key variable is not otherwise used ([#7408](https://github.com/sveltejs/svelte/issues/7408))
- Add `Symbol` as a known global ([#7418](https://github.com/sveltejs/svelte/issues/7418))

## 3.46.6

- Actually include action TypeScript interface in published package ([#7407](https://github.com/sveltejs/svelte/pull/7407))

## 3.46.5

- Add TypeScript interfaces for typing actions ([#6538](https://github.com/sveltejs/svelte/issues/6538))
- Do not generate `unused-export-let` warning inside `<script context="module">` blocks ([#7055](https://github.com/sveltejs/svelte/issues/7055))
- Do not collapse whitespace-only CSS vars ([#7152](https://github.com/sveltejs/svelte/issues/7152))
- Add `aria-description` to the list of allowed ARIA attributes ([#7301](https://github.com/sveltejs/svelte/issues/7301))
- Fix attribute escaping during SSR ([#7327](https://github.com/sveltejs/svelte/issues/7327))
- Prevent `.innerHTML` optimization from being used when `style:` directive is present ([#7386](https://github.com/sveltejs/svelte/issues/7386))

## 3.46.4

- Avoid `maximum call stack size exceeded` errors on large components ([#4694](https://github.com/sveltejs/svelte/issues/4694))
- Preserve leading space with `preserveWhitespace: true` ([#4731](https://github.com/sveltejs/svelte/issues/4731))
- Preserve leading space in `<pre>` tags ([#6437](https://github.com/sveltejs/svelte/issues/6437))
- Improve error message when trying to use `style:` directives on inline components ([#7177](https://github.com/sveltejs/svelte/issues/7177))
- Add `FormData` as a known global ([#7199](https://github.com/sveltejs/svelte/pull/7199))
- Mark `css`/`instance`/`module` AST properties as optional in types ([#7204](https://github.com/sveltejs/svelte/pull/7204))

## 3.46.3

- Ignore whitespace in `{#each}` blocks when containing elements with `animate:` ([#5477](https://github.com/sveltejs/svelte/pull/5477))
- Throw compiler error when variable in `context="instance"` collides with import in `context="module"` ([#7090](https://github.com/sveltejs/svelte/issues/7090))
- Fix compiler crash when `{@const}` contains arrow functions ([#7134](https://github.com/sveltejs/svelte/issues/7134))

## 3.46.2

- Export `FlipParams` interface from `svelte/animate` ([#7103](https://github.com/sveltejs/svelte/issues/7103))
- Fix `style:` directive reactivity inside `{#each}` block ([#7136](https://github.com/sveltejs/svelte/issues/7136))

## 3.46.1

- Handle `style:kebab-case` directives ([#7122](https://github.com/sveltejs/svelte/issues/7122))
- Improve AST produced for `style:` directives ([#7127](https://github.com/sveltejs/svelte/pull/7127))

## 3.46.0

- Implement `{@const}` tag ([RFC #33](https://github.com/sveltejs/rfcs/pull/33), [#6413](https://github.com/sveltejs/svelte/pull/6413))
- Implement `style:` directive ([RFC #42](https://github.com/sveltejs/rfcs/pull/42), [#5923](https://github.com/sveltejs/svelte/pull/5923))
- Fix style manager conflicts when using multiple Svelte instances ([#7026](https://github.com/sveltejs/svelte/issues/7026))
- Fix hydration when using `{@html}` ([#7115](https://github.com/sveltejs/svelte/issues/7115))

## 3.45.0

- Fix non-boolean attribute rendering in SSR to render truthy values as-is ([#6121](https://github.com/sveltejs/svelte/issues/6121))
- Fix binding to a member expression also invalidating the member property ([#6921](https://github.com/sveltejs/svelte/issues/6921))
- Fix default values in `{#each}`/etc. destructurings not being considered references for the purposes of compiler warnings ([#6964](https://github.com/sveltejs/svelte/issues/6964))
- Fix `{:else if}` value incorrectly being cached ([#7043](https://github.com/sveltejs/svelte/pull/7043))
- Add `a11y-no-redundant-roles` warning ([#7067](https://github.com/sveltejs/svelte/pull/7067))
- Fix code generation error with arrow functions whose bodies are object destructuring assignments ([#7087](https://github.com/sveltejs/svelte/issues/7087))

## 3.44.3

- Fix `bind:this` binding inside `onMount` for manually instantiated component ([#6760](https://github.com/sveltejs/svelte/issues/6760))
- Prevent cursor jumps with one-way binding for other `type="text"`-like `<input>`s ([#6941](https://github.com/sveltejs/svelte/pull/6941))
- Exclude `async` loops from `loopGuardTimeout` ([#6945](https://github.com/sveltejs/svelte/issues/6945))

## 3.44.2

- Fix overly restrictive preprocessor types ([#6904](https://github.com/sveltejs/svelte/pull/6904))
- More specific typing for crossfade function - returns a tuple, not an array ([#6926](https://github.com/sveltejs/svelte/issues/6926))
- Add `URLSearchParams` as a known global ([#6938](https://github.com/sveltejs/svelte/pull/6938))
- Add `types` field to `exports` map ([#6939](https://github.com/sveltejs/svelte/issues/6939))

## 3.44.1

- Fix code generation when a multi-line `return` statement contains comments ([code-red#36](https://github.com/Rich-Harris/code-red/issues/36))
- Fix code generation when `for`/`if`/`while` statements have empty bodies ([#6884](https://github.com/sveltejs/svelte/issues/6884))

## 3.44.0

- Add `enableSourcemap` compiler option ([#6835](https://github.com/sveltejs/svelte/pull/6835))

## 3.43.2

- Fix regression where user-specified `import`s were not rewritten according to the `sveltePath` option ([#6834](https://github.com/sveltejs/svelte/issues/6834))

## 3.43.1

- Prevent a rejecting promise used in `{#await}` during SSR from appearing as an unhandled rejection ([#6789](https://github.com/sveltejs/svelte/issues/6789))

## 3.43.0

- Use export map to expose no-op versions of lifecycle functions for SSR ([#6743](https://github.com/sveltejs/svelte/pull/6743))
- Prefer `context` passed to component constructor, even when running synchronously in another component ([#6753](https://github.com/sveltejs/svelte/issues/6753))
- Handle preprocessors that return empty sourcemaps ([#6757](https://github.com/sveltejs/svelte/pull/6757))

## 3.42.6

- Hide private preprocess typings ([#6622](https://github.com/sveltejs/svelte/issues/6622))
- Fix reactive function in `{:else if}` expression not being properly re-run ([#6727](https://github.com/sveltejs/svelte/pull/6727))

## 3.42.5

- In `draw` transition, account for `stroke-linecap` in determining length ([#4540](https://github.com/sveltejs/svelte/issues/4540))
- Fix regression with destructuring assignments with default values ([#6699](https://github.com/sveltejs/svelte/issues/6699))

## 3.42.4

- Only apply optimized `src` attribute handling when in an `html` namespace ([#6575](https://github.com/sveltejs/svelte/issues/6575))
- Fix styles for transitions and animations being attached to the wrong `document` in `<iframe>`s ([#6637](https://github.com/sveltejs/svelte/issues/6637))
- Fix `<select>` with a `{...spread}` attribute that didn't provide a `value` key getting its value improperly unset ([#6675](https://github.com/sveltejs/svelte/issues/6675))

## 3.42.3

- Add `BigInt` as a known global ([#6671](https://github.com/sveltejs/svelte/pull/6671))
- Fix regression where `onDestroy` in `svelte/ssr` was improperly a no-op ([#6676](https://github.com/sveltejs/svelte/issues/6676))

## 3.42.2

- Collapse whitespace in `class` and `style` attributes ([#6004](https://github.com/sveltejs/svelte/issues/6004))
- Deselect all `<option>`s in a `<select>` where the bound `value` doesn't match any of them ([#6126](https://github.com/sveltejs/svelte/issues/6126))
- In hydrated components, only rely on helpers for creating the types of elements present in the component ([#6555](https://github.com/sveltejs/svelte/issues/6555))
- Add `HTMLElement` and `SVGElement` as known globals ([#6643](https://github.com/sveltejs/svelte/issues/6643))
- Account for scaling in `flip` animations ([#6657](https://github.com/sveltejs/svelte/issues/6657))

## 3.42.1

- Fix regression with reordering keyed `{#each}` blocks when compiling with hydration enabled ([#6561](https://github.com/sveltejs/svelte/issues/6561))

## 3.42.0

- Allow `use:actions` to be used on `<svelte:body>` ([#3163](https://github.com/sveltejs/svelte/issues/3163))
- Improve parser errors for certain invalid components ([#6259](https://github.com/sveltejs/svelte/issues/6259), [#6288](https://github.com/sveltejs/svelte/issues/6288))
- Fix paths in generator JS sourcemaps to be relative ([#6598](https://github.com/sveltejs/svelte/pull/6598))
- Fix overzealous warnings about `context="module"` variables not being reactive ([#6606](https://github.com/sveltejs/svelte/issues/6606))

## 3.41.0

- Support `export { ... } from` syntax in components ([#2214](https://github.com/sveltejs/svelte/issues/2214))
- Support `export let { ... } =` syntax in components ([#5612](https://github.com/sveltejs/svelte/issues/5612))
- Support `{#await ... then/catch}` without a variable for the resolved/rejected value ([#6270](https://github.com/sveltejs/svelte/issues/6270))

## 3.40.3

- Fix `<slot>` data when a transition is cancelled before completing ([#5394](https://github.com/sveltejs/svelte/issues/5394))
- Fix destructuring into variables beginning with `$` so that they result in store updates ([#5653](https://github.com/sveltejs/svelte/issues/5653))
- Fix `in:` transition configuration not properly updating when it's changed after its initial creation ([#6505](https://github.com/sveltejs/svelte/issues/6505))
- Fix applying `:global()` for `>` selector combinator ([#6550](https://github.com/sveltejs/svelte/issues/6550))
- Fix mounting component at detached DOM node ([#6567](https://github.com/sveltejs/svelte/issues/6567))

## 3.40.2

- Fix dynamic `autofocus={...}` attribute handling ([#4995](https://github.com/sveltejs/svelte/issues/4995))
- Add filename to combined source map if needed ([#6089](https://github.com/sveltejs/svelte/pull/6089))
- In AST, parse empty attribute values as an empty string ([#6286](https://github.com/sveltejs/svelte/issues/6286))
- Fix tracking whether transition has started ([#6399](https://github.com/sveltejs/svelte/pull/6399))
- Fix incorrect scoping of `:global()` selectors ([#6550](https://github.com/sveltejs/svelte/issues/6550))

## 3.40.1

- Fix store reactivity regression when using reactive statements ([#6557](https://github.com/sveltejs/svelte/issues/6557))

## 3.40.0

- Support rendering a component in a shadow DOM ([#5869](https://github.com/sveltejs/svelte/issues/5869))
- Fix `:root` selector being erroneously scoped to component ([#4767](https://github.com/sveltejs/svelte/issues/4767))
- Fix `.end` in AST for expressions inside attributes ([#6258](https://github.com/sveltejs/svelte/issues/6258))
- Fix one-way `<select>` binding when it has a spread attribute ([#6433](https://github.com/sveltejs/svelte/issues/6433))
- Various hydration improvements and fixes ([#6449](https://github.com/sveltejs/svelte/pull/6449))
- Use smaller versions of internal helpers when compiling without hydration support ([#6462](https://github.com/sveltejs/svelte/issues/6462))
- Fix two-way binding of values when updating through synchronous component accessors ([#6502](https://github.com/sveltejs/svelte/issues/6502))

## 3.39.0

- Support `bind:group` in SSR ([#4621](https://github.com/sveltejs/svelte/pull/4621))
- Add a11y warning `a11y-mouse-events-have-key-events` which checks that `mouseover`/`mouseout` are accompanied by `focus`/`blur` event handlers ([#5938](https://github.com/sveltejs/svelte/pull/5938))
- Make it possible to silence more warnings ([#5954](https://github.com/sveltejs/svelte/issues/5954))
- Add `|trusted` event modifier ([#6137](https://github.com/sveltejs/svelte/issues/6137))
- Add `varsReport` compiler option to include all variables reference in the component in the `variables` report ([#6192](https://github.com/sveltejs/svelte/pull/6192))
- Add `errorMode` compiler option to try to continue compiling when an error is detected ([#6194](https://github.com/sveltejs/svelte/pull/6194))
- Expose `svelte/ssr` which exports lifecycle methods as no-ops ([#6416](https://github.com/sveltejs/svelte/pull/6416))
- Add `getAllContexts` ([#6447](https://github.com/sveltejs/svelte/issues/6447))
- Throw proper error for `export default function() {}` and `export default class {}` rather than crashing the compiler ([#3275](https://github.com/sveltejs/svelte/issues/3275))
- Fix SSR rendering of falsy `input` values ([#4551](https://github.com/sveltejs/svelte/issues/4551))
- Fix `preserveComments` in SSR mode ([#4730](https://github.com/sveltejs/svelte/issues/4730))
- Do not warn if `context="module"` variables are not the only dependencies in reactive statements ([#5954](https://github.com/sveltejs/svelte/issues/5954))
- Stop checking `a11y-media-has-caption` a11y warning on `<audio>` elements ([#6054](https://github.com/sveltejs/svelte/issues/6054))
- Fix erroneous "unknown prop" warning when using slot on a component ([#6065](https://github.com/sveltejs/svelte/pull/6065))
- Add sourcemaps to all HTML elements ([#6092](https://github.com/sveltejs/svelte/issues/6092))
- Relax `derived` function signature ([#6178](https://github.com/sveltejs/svelte/issues/6178))
- Throw compiler error when passing empty directive names ([#6299](https://github.com/sveltejs/svelte/issues/6299))
- Fix compiler error when using `:where()` inside `:global()` ([#6434](https://github.com/sveltejs/svelte/issues/6434))
- Fix ordering of elements in keyed `{#each}` ([#6444](https://github.com/sveltejs/svelte/issues/6444))
- Remove deprecated a11y warning `a11y-no-onchange warning` ([#6457](https://github.com/sveltejs/svelte/issues/6457))
- Fix `:global()` with pseudo element not being seen as global ([#6468](https://github.com/sveltejs/svelte/issues/6468))
- Allow `:global()` to contain multiple selectors when it is not part of a larger selector ([#6477](https://github.com/sveltejs/svelte/issues/6477))
- Make `<script>` and `<style>` end tag parsing more robust ([#6511](https://github.com/sveltejs/svelte/pull/6511))

## 3.38.3

- Speed up hydration by reducing amount of element reorderings ([#4308](https://github.com/sveltejs/svelte/issues/4308))
- Fix escaping attribute values when using a spread in SSR ([#5756](https://github.com/sveltejs/svelte/issues/5756))
- Throw compiler error when `:global()` contains multiple selectors ([#5907](https://github.com/sveltejs/svelte/issues/5907))
- Give explicit error rather than crashing when an attribute shorthand `{}` is empty ([#6086](https://github.com/sveltejs/svelte/issues/6086))
- Make `<textarea>` end tag parsing more robust ([#6276](https://github.com/sveltejs/svelte/issues/6276))
- Fix `:global(...):some-pseudoclass` selectors not being seen as global ([#6306](https://github.com/sveltejs/svelte/issues/6306))
- Fix type signatures of `writable` and `readable` so it's possible to call them without arguments ([#6291](https://github.com/sveltejs/svelte/issues/6291), [#6345](https://github.com/sveltejs/svelte/issues/6345))
- Preserve `this` in bubbled events ([#6310](https://github.com/sveltejs/svelte/issues/6310))
- Fix slot props not updating when transition is aborted ([#6386](https://github.com/sveltejs/svelte/issues/6386))
- Fix generic props relationship in `SvelteComponentTyped` ([#6400](https://github.com/sveltejs/svelte/pull/6400))

## 3.38.2

- Revert hydration optimisation for the time being ([#6279](https://github.com/sveltejs/svelte/issues/6279))

## 3.38.1

- Fix hydration regression ([#6274](https://github.com/sveltejs/svelte/issues/6274))

## 3.38.0

- Avoid recreating DOM elements during hydration ([#1067](https://github.com/sveltejs/svelte/issues/1067))
- Support passing CSS custom properties to component ([#5628](https://github.com/sveltejs/svelte/issues/5628))
- Support `:global()` as part of compound CSS selectors ([#6222](https://github.com/sveltejs/svelte/issues/6222))
- Fix updating `<slot>` contents when there's an aborted transition ([#3542](https://github.com/sveltejs/svelte/issues/3542))
- Fix setting boolean attributes on custom elements ([#5951](https://github.com/sveltejs/svelte/issues/5951))
- Add missing function overload for `derived` to allow explicitly setting an initial value for non-async derived stores ([#6172](https://github.com/sveltejs/svelte/pull/6172))
- Fix dynamic `href` values erroneously triggering a11y warnings ([#5990](https://github.com/sveltejs/svelte/issues/5990))
- Fix scope leak when updating an `{#await}` block ([#6173](https://github.com/sveltejs/svelte/issues/6173))
- Pass full markup source to `script`/`style` preprocessors ([#6169](https://github.com/sveltejs/svelte/pull/6169))
- Fix `crossfade` types to mark `fallback` as optional ([#6201](https://github.com/sveltejs/svelte/pull/6201))
- Add missing "context" typing to `SvelteComponent` constructor options ([#6236](https://github.com/sveltejs/svelte/pull/6236))
- Don't automatically switch to `svg` namespace when in `foreign` namespace ([#6257](https://github.com/sveltejs/svelte/issues/6257))

## 3.37.0

- Allow root-level context to be passed to the component constructor ([#6032](https://github.com/sveltejs/svelte/pull/6032))

## 3.36.0

- Add `this: void` typing to store functions ([#6094](https://github.com/sveltejs/svelte/pull/6094))
- Export `Spring`, `Tweened` and `EasingFunction` interfaces ([#6070](https://github.com/sveltejs/svelte/issues/6070), [#6056](https://github.com/sveltejs/svelte/pull/6056))
- Export interfaces for transition parameters ([#5207](https://github.com/sveltejs/svelte/issues/5207))
- Export store's useful TypeScript definitions ([#5864](https://github.com/sveltejs/svelte/issues/5864))
- Fix previous breaking change to `svelte/preprocess` types location ([#6100](https://github.com/sveltejs/svelte/pull/6100))
- Fix missing slotted elements in AST ([#6066](https://github.com/sveltejs/svelte/issues/6066))

## 3.35.0

- Implement slotted components and `<svelte:fragment slot="...">` ([#1037](https://github.com/sveltejs/svelte/issues/1037), [#2079](https://github.com/sveltejs/svelte/issues/2079))
- Fix reactivity bug where `slot="..."` is specified after attributes that should be reactive ([#5626](https://github.com/sveltejs/svelte/issues/5626))

## 3.34.0

- Add a `cssHash` option for controlling the classname used for CSS scoping ([#570](https://github.com/sveltejs/svelte/issues/570))

## 3.33.0

- In custom elements, call `onMount` functions when connecting and clean up when disconnecting ([#1152](https://github.com/sveltejs/svelte/issues/1152), [#2227](https://github.com/sveltejs/svelte/issues/2227), [#4522](https://github.com/sveltejs/svelte/pull/4522))
- Allow destructured defaults to refer to other variables ([#5066](https://github.com/sveltejs/svelte/issues/5066))
- Do not emit `contextual-store` warnings for function parameters or declared variables ([#6008](https://github.com/sveltejs/svelte/pull/6008))

## 3.32.3

- Fix removal of lone `:host` selectors ([#5982](https://github.com/sveltejs/svelte/issues/5982))

## 3.32.2

- Fix unnecessary additional invalidation with `<Component bind:prop={obj.foo}/>` ([#3075](https://github.com/sveltejs/svelte/issues/3075), [#4447](https://github.com/sveltejs/svelte/issues/4447), [#5555](https://github.com/sveltejs/svelte/issues/5555))
- Fix scoping of selectors with `:global()` and `~` sibling combinators ([#5499](https://github.com/sveltejs/svelte/issues/5499))
- Fix removal of `:host` selectors as unused when compiling to a custom element ([#5946](https://github.com/sveltejs/svelte/issues/5946))

## 3.32.1

- Warn when using `module` variables reactively, and close weird reactivity loophole ([#5847](https://github.com/sveltejs/svelte/pull/5847))
- Throw a parser error for `class:` directives with an empty class name ([#5858](https://github.com/sveltejs/svelte/issues/5858))
- Fix extraneous store subscription in SSR mode ([#5883](https://github.com/sveltejs/svelte/issues/5883))
- Don't emit update code for `class:` directives whose expression is not dynamic ([#5919](https://github.com/sveltejs/svelte/issues/5919))
- Fix type inference for derived stores ([#5935](https://github.com/sveltejs/svelte/pull/5935))
- Make parameters of built-in animations and transitions optional ([#5936](https://github.com/sveltejs/svelte/pull/5936))
- Make `SvelteComponentDev` typings more forgiving ([#5937](https://github.com/sveltejs/svelte/pull/5937))
- Fix `foreign` elements incorrectly disallowing `bind:this` ([#5942](https://github.com/sveltejs/svelte/pull/5942))

## 3.32.0

- Allow multiple instances of the same action on an element ([#5516](https://github.com/sveltejs/svelte/issues/5516))
- Support `foreign` namespace, which disables certain HTML5-specific behaviour and checks ([#5652](https://github.com/sveltejs/svelte/pull/5652))
- Support inline comment sourcemaps in code from preprocessors ([#5854](https://github.com/sveltejs/svelte/pull/5854))

## 3.31.2

- Rework SSR store handling to subscribe and unsubscribe as in DOM mode ([#3375](https://github.com/sveltejs/svelte/issues/3375), [#3582](https://github.com/sveltejs/svelte/issues/3582), [#3636](https://github.com/sveltejs/svelte/issues/3636))
- Fix error when removing elements that are already transitioning out ([#5789](https://github.com/sveltejs/svelte/issues/5789), [#5808](https://github.com/sveltejs/svelte/issues/5808))
- Fix duplicate content race condition with `{#await}` blocks and out transitions ([#5815](https://github.com/sveltejs/svelte/issues/5815))
- Deconflict variable names used for contextual actions ([#5834](https://github.com/sveltejs/svelte/issues/5834))

## 3.31.1

- Fix scrolling of element with resize listener by making the `<iframe>` have `z-index: -1` ([#5448](https://github.com/sveltejs/svelte/issues/5448))
- Fix location of automatically declared reactive variables ([#5749](https://github.com/sveltejs/svelte/issues/5749))
- Warn when using `className` or `htmlFor` attributes ([#5777](https://github.com/sveltejs/svelte/issues/5777))
- Fix checkbox `bind:group` in keyed `{#each}` where the array can be reordered ([#5779](https://github.com/sveltejs/svelte/issues/5779))
- Fix checkbox `bind:group` in nested `{#each}` contexts ([#5811](https://github.com/sveltejs/svelte/issues/5811))
- Add graphics roles as known ARIA roles ([#5822](https://github.com/sveltejs/svelte/pull/5822))
- Fix local transitions if a parent has a cancelled outro transition ([#5829](https://github.com/sveltejs/svelte/issues/5829))
- Support `use:obj.some.deep.function` as actions ([#5844](https://github.com/sveltejs/svelte/issues/5844))

## 3.31.0

- Use a separate `SvelteComponentTyped` interface for typed components ([#5738](https://github.com/sveltejs/svelte/pull/5738))

## 3.30.1

- Support consuming decoded sourcemaps as created by the `source-map` library's `SourceMapGenerator` ([#5722](https://github.com/sveltejs/svelte/issues/5722))
- Actually export `hasContext` ([#5726](https://github.com/sveltejs/svelte/issues/5726))

## 3.30.0

- Add a typed `SvelteComponent` interface ([#5431](https://github.com/sveltejs/svelte/pull/5431))
- Support spread into `<slot>` props ([#5456](https://github.com/sveltejs/svelte/issues/5456))
- Fix setting reactive dependencies which don't appear in the template to `undefined` ([#5538](https://github.com/sveltejs/svelte/issues/5538))
- Support preprocessor sourcemaps during compilation ([#5584](https://github.com/sveltejs/svelte/pull/5584))
- Fix ordering of elements when using `{#if}` inside `{#key}` ([#5680](https://github.com/sveltejs/svelte/issues/5680))
- Add `hasContext` lifecycle function ([#5690](https://github.com/sveltejs/svelte/pull/5690))
- Fix missing `walk` types in `svelte/compiler` ([#5696](https://github.com/sveltejs/svelte/pull/5696))

## 3.29.7

- Include `./register` in exports map ([#5670](https://github.com/sveltejs/svelte/issues/5670))

## 3.29.6

- Include `./package.json` in export map ([#5659](https://github.com/sveltejs/svelte/issues/5659))

## 3.29.5

- Fix `$$props` and `$$restProps` when compiling to a custom element ([#5482](https://github.com/sveltejs/svelte/issues/5482))
- Include an export map in `package.json` ([#5556](https://github.com/sveltejs/svelte/issues/5556))
- Fix function calls in `<slot>` props that use contextual values ([#5565](https://github.com/sveltejs/svelte/issues/5565))
- Fix handling aborted transitions in `{:else}` blocks ([#5573](https://github.com/sveltejs/svelte/issues/5573))
- Add `Element` and `Node` to known globals ([#5586](https://github.com/sveltejs/svelte/issues/5586))
- Fix `$$slots` when compiling to custom elements ([#5594](https://github.com/sveltejs/svelte/issues/5594))
- Fix internal `import`s so that we're exposing a valid ES module ([#5617](https://github.com/sveltejs/svelte/issues/5617))

## 3.29.4

- Fix code generation error with `??` alongside logical operators ([#5558](https://github.com/sveltejs/svelte/issues/5558))

## 3.29.3

- Hopefully actually republish with proper UMD build for use in the REPL

## 3.29.2

- Republish with proper UMD build for use in the REPL

## 3.29.1

- Fix compiler hanging on `<slot slot="...">` ([#5475](https://github.com/sveltejs/svelte/issues/5475))
- Fix types on `get` function in `svelte/store` ([#5483](https://github.com/sveltejs/svelte/pull/5483))
- Add missing `end` field on ASTs for non-top-level `<style>` elements ([#5487](https://github.com/sveltejs/svelte/pull/5487))
- Fix `{#if}` inside `{#await}` with destructuring ([#5508](https://github.com/sveltejs/svelte/issues/5508))
- Fix types on lifecycle hooks ([#5529](https://github.com/sveltejs/svelte/pull/5529))

## 3.29.0

- Support `<slot slot="...">` ([#2079](https://github.com/sveltejs/svelte/issues/2079))
- Fix unmounting components with a bidirectional transition with a delay ([#4954](https://github.com/sveltejs/svelte/issues/4954))
- Add types to `get` function in `svelte/store` ([#5269](https://github.com/sveltejs/svelte/pull/5269))
- Add a warning when a component looks like it's trying to use another component without beginning with a capital letter ([#5302](https://github.com/sveltejs/svelte/pull/5302))
- Add `EventSource` to known globals ([#5463](https://github.com/sveltejs/svelte/issues/5463))
- Fix compiler exception with `~`/`+` combinators and `{...spread}` attributes ([#5465](https://github.com/sveltejs/svelte/issues/5465))

## 3.28.0

- Add `{#key}` block for keying arbitrary content on an expression ([#1469](https://github.com/sveltejs/svelte/issues/1469))

## 3.27.0

- Add `|nonpassive` event modifier, explicitly passing `passive: false` ([#2068](https://github.com/sveltejs/svelte/issues/2068))
- Scope CSS selectors with `~` and `+` combinators ([#3104](https://github.com/sveltejs/svelte/issues/3104))
- Fix keyed `{#each}` not reacting to key changing ([#5444](https://github.com/sveltejs/svelte/issues/5444))
- Fix destructuring into store values ([#5449](https://github.com/sveltejs/svelte/issues/5449))
- Fix erroneous `missing-declaration` warning with `use:obj.method` ([#5451](https://github.com/sveltejs/svelte/issues/5451))

## 3.26.0

- Support `use:obj.method` as actions ([#3935](https://github.com/sveltejs/svelte/issues/3935))
- Support `_` as numeric separator ([#5407](https://github.com/sveltejs/svelte/issues/5407))
- Fix assignments to properties on store values ([#5412](https://github.com/sveltejs/svelte/issues/5412))
- Add special style scoping handling of `[open]` selectors on `<details>` elements ([#5421](https://github.com/sveltejs/svelte/issues/5421))
- Support `import.meta` in template expressions ([#5422](https://github.com/sveltejs/svelte/issues/5422))

## 3.25.1

- Fix specificity of certain styles involving a child selector ([#4795](https://github.com/sveltejs/svelte/issues/4795))
- Fix transitions that are parameterised with stores ([#5244](https://github.com/sveltejs/svelte/issues/5244))
- Fix scoping of styles involving child selector and `*` ([#5370](https://github.com/sveltejs/svelte/issues/5370))
- Fix destructuring which reassigns stores ([#5388](https://github.com/sveltejs/svelte/issues/5388))
- Fix `{#await}`s with no `{:catch}` getting stuck unresolved if the promise rejects ([#5401](https://github.com/sveltejs/svelte/issues/5401))

## 3.25.0

- Use `null` rather than `undefined` for coerced bound value of `<input type="number">` ([#1701](https://github.com/sveltejs/svelte/issues/1701))
- Expose object of which slots have received content in `$$slots` ([#2106](https://github.com/sveltejs/svelte/issues/2106))
- Correctly disallow using lifecycle hooks after synchronous component initialisation ([#4259](https://github.com/sveltejs/svelte/issues/4259), [#4899](https://github.com/sveltejs/svelte/issues/4899))
- Re-throw an unhandled rejection when an `{#await}` block with no `{:catch}` gets a rejection ([#5129](https://github.com/sveltejs/svelte/issues/5129))
- Add types to `createEventDispatcher` ([#5211](https://github.com/sveltejs/svelte/issues/5211))
- In SSR mode, do not automatically declare variables for reactive assignments to member expressions ([#5247](https://github.com/sveltejs/svelte/issues/5247))
- Include selector in message of `unused-css-selector` warning ([#5252](https://github.com/sveltejs/svelte/issues/5252))
- Fix using `<Namespaced.Component/>`s in child `{#await}`/`{#each}` contexts ([#5255](https://github.com/sveltejs/svelte/issues/5255))
- Fix using `<svelte:component>` in `{:catch}` ([#5259](https://github.com/sveltejs/svelte/issues/5259))
- Fix setting one-way bound `<input>` `value` to `undefined` when it has spread attributes ([#5270](https://github.com/sveltejs/svelte/issues/5270))
- Fix deep two-way bindings inside an `{#each}` involving a store ([#5286](https://github.com/sveltejs/svelte/issues/5286))
- Use valid XHTML for elements that are optimised and inserted with `.innerHTML` ([#5315](https://github.com/sveltejs/svelte/issues/5315))
- Fix reactivity of `$$props` in slot fallback content ([#5367](https://github.com/sveltejs/svelte/issues/5367))

## 3.24.1

- Prevent duplicate invalidation with certain two-way component bindings ([#3180](https://github.com/sveltejs/svelte/issues/3180), [#5117](https://github.com/sveltejs/svelte/issues/5117), [#5144](https://github.com/sveltejs/svelte/issues/5144))
- Fix reactivity when passing `$$props` to a `<slot>` ([#3364](https://github.com/sveltejs/svelte/issues/3364))
- Fix transitions on `{#each}` `{:else}` ([#4970](https://github.com/sveltejs/svelte/issues/4970))
- Fix unneeded invalidation of `$$props` and `$$restProps` ([#4993](https://github.com/sveltejs/svelte/issues/4993), [#5118](https://github.com/sveltejs/svelte/issues/5118))
- Provide better compiler error message when mismatched tags are due to autoclosing of tags ([#5049](https://github.com/sveltejs/svelte/issues/5049))
- Add `a11y-label-has-associated-control` warning ([#5074](https://github.com/sveltejs/svelte/pull/5074))
- Add `a11y-media-has-caption` warning ([#5075](https://github.com/sveltejs/svelte/pull/5075))
- Fix `bind:group` when using contextual reference ([#5174](https://github.com/sveltejs/svelte/issues/5174))

## 3.24.0

- Support nullish coalescing (`??`) and optional chaining (`?.`) operators ([#1972](https://github.com/sveltejs/svelte/issues/1972))
- Support `import.meta` ([#4379](https://github.com/sveltejs/svelte/issues/4379))
- Fix only setting `<input>` values when they're changed when there are spread attributes ([#4418](https://github.com/sveltejs/svelte/issues/4418))
- Fix placement of `{@html}` when used at the root of a slot, at the root of a component, or in `<svelte:head>` ([#5012](https://github.com/sveltejs/svelte/issues/5012), [#5071](https://github.com/sveltejs/svelte/pull/5071))
- Fix certain handling of two-way bound `contenteditable` elements ([#5018](https://github.com/sveltejs/svelte/issues/5018))
- Fix handling of `import`ed value that is used as a store and is also mutated ([#5019](https://github.com/sveltejs/svelte/issues/5019))
- Do not display `a11y-missing-content` warning on elements with `contenteditable` bindings ([#5020](https://github.com/sveltejs/svelte/issues/5020))
- Fix handling of `this` in inline function expressions in the template ([#5033](https://github.com/sveltejs/svelte/issues/5033))
- Fix collapsing HTML with static content ([#5040](https://github.com/sveltejs/svelte/issues/5040))
- Prevent use of `$store` at compile time when top-level `store` has been shadowed ([#5048](https://github.com/sveltejs/svelte/issues/5048))
- Update `<select>` with one-way `value` binding when the available `<option>`s change ([#5051](https://github.com/sveltejs/svelte/issues/5051))
- Fix published `tweened` types so the `.set()` and `.update()` options are optional ([#5062](https://github.com/sveltejs/svelte/issues/5062))
- Fix contextual `bind:this` inside `{#each}` block ([#5067](https://github.com/sveltejs/svelte/issues/5067))
- Preprocess self-closing `<script>` and `<style>` tags ([#5080](https://github.com/sveltejs/svelte/issues/5080))
- Fix types for animation- and transition-related param objects so each param is optional ([#5083](https://github.com/sveltejs/svelte/pull/5083))

## 3.23.2

- Fix `bind:group` inside `{#each}` ([#3243](https://github.com/sveltejs/svelte/issues/3243))
- Don't crash when using an arrow function as a statement ([#4617](https://github.com/sveltejs/svelte/issues/4617))
- Deconflict `bind:this` variable ([#4636](https://github.com/sveltejs/svelte/issues/4636))

## 3.23.1

- Fix checkbox `bind:group` when multiple options have the same value ([#4397](https://github.com/sveltejs/svelte/issues/4397))
- Fix `bind:this` to the value of an `{#each}` block ([#4517](https://github.com/sveltejs/svelte/issues/4517))
- Fix reactivity when assigning to contextual `{#each}` variable ([#4574](https://github.com/sveltejs/svelte/issues/4574), [#4744](https://github.com/sveltejs/svelte/issues/4744))
- Fix binding to contextual `{#each}` values that shadow outer names ([#4757](https://github.com/sveltejs/svelte/issues/4757))
- Work around EdgeHTML DOM issue when removing attributes during hydration ([#4911](https://github.com/sveltejs/svelte/pull/4911))
- Throw CSS parser error when `:global()` does not contain a selector ([#4930](https://github.com/sveltejs/svelte/issues/4930))

## 3.23.0

- Update `<select>` with `bind:value` when the available `<option>`s change ([#1764](https://github.com/sveltejs/svelte/issues/1764))
- Add `muted` binding for media elements ([#2998](https://github.com/sveltejs/svelte/issues/2998))
- Fix inconsistencies when setting a two-way bound `<input>` to `undefined` ([#3569](https://github.com/sveltejs/svelte/issues/3569))
- Fix setting `<select multiple>` when there are spread attributes ([#4392](https://github.com/sveltejs/svelte/issues/4392))
- Fix let-less `<slot>` with context overflow ([#4624](https://github.com/sveltejs/svelte/issues/4624))
- Fix resize listening on certain older browsers ([#4752](https://github.com/sveltejs/svelte/issues/4752))
- Add `a11y-no-onchange` warning ([#4788](https://github.com/sveltejs/svelte/pull/4788))
- Fix `use:` actions being recreated when a keyed `{#each}` is reordered ([#4693](https://github.com/sveltejs/svelte/issues/4693))
- Fix `{@html}` when using tags that can only appear inside certain tags ([#4852](https://github.com/sveltejs/svelte/issues/4852))
- Fix reactivity when binding directly to `{#each}` context ([#4879](https://github.com/sveltejs/svelte/issues/4879))

## 3.22.3

- Support default values and trailing commas in destructuring `{#await}` ([#4560](https://github.com/sveltejs/svelte/issues/4560), [#4810](https://github.com/sveltejs/svelte/issues/4810))
- Fix handling of `tweened` store when set using `duration: 0` ([#4799](https://github.com/sveltejs/svelte/issues/4799), [#4846](https://github.com/sveltejs/svelte/issues/4846))
- Fix setting `value` attribute with `bind:group` and attribute spread ([#4803](https://github.com/sveltejs/svelte/issues/4803))
- Fix issue with compound `{#if}` block involving static condition, dynamic condition, and inline component ([#4840](https://github.com/sveltejs/svelte/issues/4840))
- Update a11y warnings per ARIA 1.2 working draft ([#4844](https://github.com/sveltejs/svelte/issues/4844))

## 3.22.2

- Fix compiler exception with `a11y-img-redundant-alt` and value-less `alt` attribute ([#4777](https://github.com/sveltejs/svelte/issues/4777))

## 3.22.1

- Fix compiler exception with `a11y-img-redundant-alt` and dynamic `alt` attribute ([#4770](https://github.com/sveltejs/svelte/issues/4770))

## 3.22.0

- Fix misaligned line numbers in source maps ([#3906](https://github.com/sveltejs/svelte/issues/3906))
- Make setting a `tweened` store using `duration: 0` instantly update the value ([#4399](https://github.com/sveltejs/svelte/issues/4399))
- Fix reactivity with imported values that are then mutated ([#4555](https://github.com/sveltejs/svelte/issues/4555))
- Fix contextual dynamic `bind:this` inside `{#each}` block ([#4686](https://github.com/sveltejs/svelte/issues/4686))
- Do not display a11y warning about missing `href` for `<a>` with `name` or `id` ([#4697](https://github.com/sveltejs/svelte/issues/4697))
- Disable infinite loop guard inside generators ([#4698](https://github.com/sveltejs/svelte/issues/4698))
- Display `a11y-invalid-attribute` warning for `href="javascript:..."` ([#4733](https://github.com/sveltejs/svelte/pull/4733))
- Implement `a11y-img-redundant-alt` warning ([#4750](https://github.com/sveltejs/svelte/pull/4750))
- Fix variable name conflict with component called `<Anchor>` ([#4768](https://github.com/sveltejs/svelte/issues/4768))

## 3.21.0

- Support dimension bindings in cross-origin environments ([#2147](https://github.com/sveltejs/svelte/issues/2147))
- Fix several related outro bugs ([#3202](https://github.com/sveltejs/svelte/issues/3202), [#3410](https://github.com/sveltejs/svelte/issues/3410), [#3685](https://github.com/sveltejs/svelte/issues/3685), [#4620](https://github.com/sveltejs/svelte/issues/4620), [#4630](https://github.com/sveltejs/svelte/issues/4630))
- Try using `globalThis` rather than `globals` for the benefit of non-Node servers and web workers ([#3561](https://github.com/sveltejs/svelte/issues/3561), [#4545](https://github.com/sveltejs/svelte/issues/4545))
- Support `{#await ... catch ...}` syntax shorthand ([#3623](https://github.com/sveltejs/svelte/issues/3623))
- Fix attaching of JS debugging comments to HTML comments ([#4565](https://github.com/sveltejs/svelte/issues/4565))
- Fix `<svelte:component/>` within `<slot/>` ([#4597](https://github.com/sveltejs/svelte/issues/4597))
- Fix bug with updating simple `{#if}` blocks ([#4629](https://github.com/sveltejs/svelte/issues/4629))
- Fix issues with `<input type="number">` updates ([#4631](https://github.com/sveltejs/svelte/issues/4631), [#4687](https://github.com/sveltejs/svelte/issues/4687))
- Prevent illegal attribute names ([#4648](https://github.com/sveltejs/svelte/issues/4648))
- Fix `{#if}` block directly within `<slot/>` ([#4703](https://github.com/sveltejs/svelte/issues/4703))

## 3.20.1

- Fix compiler regression with slots ([#4562](https://github.com/sveltejs/svelte/issues/4562))

## 3.20.0

- Allow destructuring in `{#await}` blocks ([#1851](https://github.com/sveltejs/svelte/issues/1851))
- Allow `<svelte:self>` to be used in a slot ([#2798](https://github.com/sveltejs/svelte/issues/2798))
- Expose object of unknown props in `$$restProps` ([#2930](https://github.com/sveltejs/svelte/issues/2930))
- Prevent passing named slots other than from the top level within a component ([#3385](https://github.com/sveltejs/svelte/issues/3385))
- Allow transitions and animations to work within iframes ([#3624](https://github.com/sveltejs/svelte/issues/3624))
- Fix initialising slot fallbacks when unnecessary ([#3763](https://github.com/sveltejs/svelte/issues/3763))
- Disallow binding directly to `const` variables ([#4479](https://github.com/sveltejs/svelte/issues/4479))
- Fix re-attaching event handlers on keyed `{#each}` blocks ([#4491](https://github.com/sveltejs/svelte/issues/4491))
- Fix updating keyed `{#each}` blocks with `{:else}` ([#4536](https://github.com/sveltejs/svelte/issues/4536), [#4549](https://github.com/sveltejs/svelte/issues/4549))
- Fix hydration of top-level content ([#4542](https://github.com/sveltejs/svelte/issues/4542))

## 3.19.2

- In `dev` mode, display a runtime warning when a component is passed an unexpected slot ([#1020](https://github.com/sveltejs/svelte/issues/1020), [#1447](https://github.com/sveltejs/svelte/issues/1447))
- In `vars` array, correctly indicate whether `module` variables are `mutated` or `reassigned` ([#3215](https://github.com/sveltejs/svelte/issues/3215))
- Fix spread props not updating in certain situations ([#3521](https://github.com/sveltejs/svelte/issues/3521), [#4480](https://github.com/sveltejs/svelte/issues/4480))
- Use the fallback content for slots if they are passed only whitespace ([#4092](https://github.com/sveltejs/svelte/issues/4092))
- Fix bitmask overflow for `{#if}` blocks ([#4263](https://github.com/sveltejs/svelte/issues/4263))
- In `dev` mode, check for unknown props even if the component has no writable props ([#4323](https://github.com/sveltejs/svelte/issues/4323))
- Exclude global variables from `$capture_state` ([#4463](https://github.com/sveltejs/svelte/issues/4463))
- Fix bitmask overflow for slots ([#4481](https://github.com/sveltejs/svelte/issues/4481))

## 3.19.1

- Do not treat modifications to `$$props` as updates to a store called `$props` ([#4368](https://github.com/sveltejs/svelte/issues/4368))
- Deconflict `value` parameter name used in contextual bindings ([#4445](https://github.com/sveltejs/svelte/issues/4445))
- Fix dev mode validation of `{#each}` blocks using strings ([#4450](https://github.com/sveltejs/svelte/issues/4450))

## 3.19.0

- Fix indirect bindings involving elements with spreads ([#3680](https://github.com/sveltejs/svelte/issues/3680))
- `$capture_state`/`$inject_state` now act on the component's entire state, rather than its props ([#3822](https://github.com/sveltejs/svelte/pull/3822))
- Warn when using `<Foo/>` and `Foo` is dynamic ([#4331](https://github.com/sveltejs/svelte/issues/4331))
- Display compilation warnings in `svelte/register` in dev mode ([#4364](https://github.com/sveltejs/svelte/issues/4364))
- Fix unneeded updating of keyed each blocks ([#4373](https://github.com/sveltejs/svelte/issues/4373))
- Throw runtime error in dev mode for non-array-like values in `{#each}` blocks ([#4408](https://github.com/sveltejs/svelte/issues/4408))

## 3.18.2

- Fix binding to module-level variables ([#4086](https://github.com/sveltejs/svelte/issues/4086))
- Improve parsing error messages when there is a pending unclosed tag ([#4131](https://github.com/sveltejs/svelte/issues/4131))
- Disallow attribute/prop names from matching two-way-bound names or `{shorthand}` attribute/prop names ([#4325](https://github.com/sveltejs/svelte/issues/4325))
- Improve performance of `flush()` by not using `.shift()` ([#4356](https://github.com/sveltejs/svelte/pull/4356))
- Permit reserved keywords as destructuring keys in `{#each}` ([#4372](https://github.com/sveltejs/svelte/issues/4372))
- Disallow reserved keywords in `{expressions}` ([#4372](https://github.com/sveltejs/svelte/issues/4372))
- Fix code generation error with precedence of arrow functions ([#4384](https://github.com/sveltejs/svelte/issues/4384))
- Fix event handlers that are dynamic via reactive declarations or stores ([#4388](https://github.com/sveltejs/svelte/issues/4388))
- Fix invalidation in expressions like `++foo.bar` ([#4393](https://github.com/sveltejs/svelte/issues/4393))

## 3.18.1

- Fix code generation error with adjacent inline and block comments ([#4312](https://github.com/sveltejs/svelte/issues/4312))
- Fix detection of unused CSS selectors that begin with a `:global()` but contain a scoped portion ([#4314](https://github.com/sveltejs/svelte/issues/4314))

## 3.18.0

- Fix infinite loop when instantiating another component during `onMount` ([#3218](https://github.com/sveltejs/svelte/issues/3218))
- Make autosubscribing to a nullish store a no-op ([#2181](https://github.com/sveltejs/svelte/issues/2181))

## 3.17.3

- Fix updating a `<slot>` inside an `{#if}` or other block ([#4292](https://github.com/sveltejs/svelte/issues/4292))
- Fix using RxJS observables in `derived` stores ([#4298](https://github.com/sveltejs/svelte/issues/4298))
- Add dev mode check to disallow duplicate keys in a keyed `{#each}` ([#4301](https://github.com/sveltejs/svelte/issues/4301))
- Fix hydration of `<title>` when starting from SSR-generated code with `hydratable: true` ([#4310](https://github.com/sveltejs/svelte/issues/4310))

## 3.17.2

- Fix removing attributes during hydration ([#1733](https://github.com/sveltejs/svelte/issues/1733))
- Disallow two-way binding to a variable declared by an `{#await}` block ([#4012](https://github.com/sveltejs/svelte/issues/4012))
- Allow access to `let:` variables in sibling attributes on slot root ([#4173](https://github.com/sveltejs/svelte/issues/4173))
- Fix `~=` and class selector matching against values separated by any whitespace characters ([#4242](https://github.com/sveltejs/svelte/issues/4242))
- Fix code generation for `await`ed expressions that need parentheses ([#4267](https://github.com/sveltejs/svelte/issues/4267))
- Preserve JavaScript comments from the original component source where possible ([#4268](https://github.com/sveltejs/svelte/issues/4268))
- Add some more known globals ([#4276](https://github.com/sveltejs/svelte/pull/4276))
- Correctly apply event modifiers to `<svelte:body>` events ([#4278](https://github.com/sveltejs/svelte/issues/4278))

## 3.17.1

- Only attach SSR mode markers to a component's `<head>` elements when compiling with `hydratable: true` ([#4258](https://github.com/sveltejs/svelte/issues/4258))

## 3.17.0

- Remove old `<head>` elements during hydration so they aren't duplicated ([#1607](https://github.com/sveltejs/svelte/issues/1607))
- Prevent text input cursor jumping in Safari with one-way binding ([#3449](https://github.com/sveltejs/svelte/issues/3449))
- Expose compiler version in dev events ([#4047](https://github.com/sveltejs/svelte/issues/4047))
- Don't run actions before their element is in the document ([#4166](https://github.com/sveltejs/svelte/issues/4166))
- Fix reactive assignments with destructuring and stores where the destructured value should be undefined ([#4170](https://github.com/sveltejs/svelte/issues/4170))
- Fix hydrating `{:else}` in `{#each}` ([#4202](https://github.com/sveltejs/svelte/issues/4202))
- Do not automatically declare variables in reactive declarations when assigning to a member expression ([#4212](https://github.com/sveltejs/svelte/issues/4212))
- Fix stringifying of attributes in SSR mode when there are spread attributes ([#4240](https://github.com/sveltejs/svelte/issues/4240))
- Only render one `<title>` in SSR mode when multiple components provide one ([#4250](https://github.com/sveltejs/svelte/pull/4250))

## 3.16.7

- Also apply actions in the order they're given along with other directives ([#2446](https://github.com/sveltejs/svelte/issues/2446), [#4156](https://github.com/sveltejs/svelte/pull/4156))
- Check whether a dynamic event handler is a function before calling it ([#4090](https://github.com/sveltejs/svelte/issues/4090))
- Correctly mark event handlers as dynamic when they involve an expression used in a `bind:` elsewhere ([#4155](https://github.com/sveltejs/svelte/pull/4155))

## 3.16.6

- Fix CSS specificity bug when encapsulating styles ([#1277](https://github.com/sveltejs/svelte/issues/1277))
- Apply directives in the order they're given ([#2446](https://github.com/sveltejs/svelte/issues/2446))
- Fix destructuring in `let:` directives ([#2751](https://github.com/sveltejs/svelte/issues/2751))
- Preserve whitespace around `<tspan>`s in `<svg>`s ([#3998](https://github.com/sveltejs/svelte/issues/3998))

## 3.16.5

- Better fix for cascading invalidations and fix some regressions ([#4098](https://github.com/sveltejs/svelte/issues/4098), [#4114](https://github.com/sveltejs/svelte/issues/4114), [#4120](https://github.com/sveltejs/svelte/issues/4120))

## 3.16.4

- Fix slots with props not propagating through to inner slots ([#4061](https://github.com/sveltejs/svelte/issues/4061))
- Fix noting autosubscribed stores as `referenced` in `vars` for tooling ([#4081](https://github.com/sveltejs/svelte/issues/4081))
- Fix cascading invalidations in certain situations ([#4094](https://github.com/sveltejs/svelte/issues/4094))

## 3.16.3

- Fix bitmask overflow when using slotted components ([#4077](https://github.com/sveltejs/svelte/issues/4077))
- Remove unnecessary `$$invalidate` calls from init block ([#4018](https://github.com/sveltejs/svelte/issues/4018))

## 3.16.2

- Handle slot updates when parent component has a bitmask overflow ([#4078](https://github.com/sveltejs/svelte/pull/4078))

## 3.16.1

- Fix unused export warning for props used as stores ([#4021](https://github.com/sveltejs/svelte/issues/4021))
- Fix `{:then}` without resolved value containing `{#each}` ([#4022](https://github.com/sveltejs/svelte/issues/4022))
- Fix incorrect code generated with `loopGuardTimeout` ([#4034](https://github.com/sveltejs/svelte/issues/4034))
- Fix handling of bitmask overflow and globals ([#4037](https://github.com/sveltejs/svelte/issues/4037))
- Fix `{:then}` containing `{#if}` ([#4044](https://github.com/sveltejs/svelte/issues/4044))
- Fix bare `import`s in `format: 'cjs'` output mode ([#4055](https://github.com/sveltejs/svelte/issues/4050))
- Warn when using a known global as a component name ([#4070](https://github.com/sveltejs/svelte/issues/4070))

## 3.16.0

- Use bitmasks to track changes ([#3945](https://github.com/sveltejs/svelte/pull/3945))
- Fix heisenbug with component styles ([#3977](https://github.com/sveltejs/svelte/issues/3977))
- Do not warn about missing expected props for `export function foo() {}` ([#3954](https://github.com/sveltejs/svelte/issues/3954))
- Fix `context="module"` exports with the same name as an instance variable ([#3983](https://github.com/sveltejs/svelte/issues/3983))
- Fix binding to contextual values from `{#each}` blocks referring to global variables ([#3992](https://github.com/sveltejs/svelte/issues/3992))
- Use `requestAnimationFrame` callback argument for smoother transitions ([#4014](https://github.com/sveltejs/svelte/pull/4014))
- Fix `listen_dev` argument order ([#4016](https://github.com/sveltejs/svelte/pull/4016))

## 3.15.0

- Hide commented sections from preprocessors ([#3894](https://github.com/sveltejs/svelte/pull/3894))
- Add `seeking` and `ended` bindings to media elements ([#3650](https://github.com/sveltejs/svelte/pull/3650))
- Add `videoWidth` and `videoHeight` bindings to video elements ([#3927](https://github.com/sveltejs/svelte/pull/3927))
- Fix for dynamic event handlers ([#3934](https://github.com/sveltejs/svelte/pull/3934))
- Handle scale transforms when using the `flip` animation ([#3555](https://github.com/sveltejs/svelte/issues/3555))
- Fix some code generation bugs ([#3929](https://github.com/sveltejs/svelte/issues/3929), [#3939](https://github.com/sveltejs/svelte/issues/3939))
- Add `aria-hidden="true"` to objects generated when adding resize-listeners, to improve accessibility ([#3948](https://github.com/sveltejs/svelte/issues/3948))

## 3.14.1

- Deconflict block method names with other variables ([#3900](https://github.com/sveltejs/svelte/issues/3900))
- Fix entity encoding issue in text nodes with constant expressions ([#3911](https://github.com/sveltejs/svelte/issues/3911))
- Make code for unknown prop warnings compatible with older js engines ([#3914](https://github.com/sveltejs/svelte/issues/3914))

## 3.14.0

- Add `loopGuardTimeout` option that augments `for`/`while` loops to prevent infinite loops, primarily for use in the REPL ([#3887](https://github.com/sveltejs/svelte/pull/3887))
- Keep component bindings in sync when changed in reactive statements ([#3382](https://github.com/sveltejs/svelte/issues/3382))
- Update attributes before bindings ([#3857](https://github.com/sveltejs/svelte/issues/3857))
- Prevent variable naming conflict ([#3899](https://github.com/sveltejs/svelte/issues/3899))

## 3.13.0

- New structured code generation, which eliminates a number of edge cases and obscure bugs ([#3539](https://github.com/sveltejs/svelte/pull/3539))

Also:

- Fix `{#each}` context not shadowing outer scope when using `bind:` ([#1565](https://github.com/sveltejs/svelte/issues/1565))
- Fix edge cases in matching selectors against elements ([#1710](https://github.com/sveltejs/svelte/issues/1710))
- Fix several bugs related to interaction of `{...spread}` attributes with other features ([#2721](https://github.com/sveltejs/svelte/issues/2721), [#2916](https://github.com/sveltejs/svelte/issues/2916), [#3421](https://github.com/sveltejs/svelte/issues/3421), [#3681](https://github.com/sveltejs/svelte/issues/3681), [#3764](https://github.com/sveltejs/svelte/issues/3764), [#3790](https://github.com/sveltejs/svelte/issues/3790))
- Allow exiting a reactive block early with `break $` ([#2828](https://github.com/sveltejs/svelte/issues/2828))
- Fix binding to props that have been renamed with `export { ... as ... }` ([#3508](https://github.com/sveltejs/svelte/issues/3508))
- Fix application of style scoping class in cases of ambiguity ([#3544](https://github.com/sveltejs/svelte/issues/3544))
- Check attributes have changed before setting them to avoid image flicker ([#3579](https://github.com/sveltejs/svelte/pull/3579))
- Fix generating malformed code for `{@debug}` tags with no dependencies ([#3588](https://github.com/sveltejs/svelte/issues/3588))
- Fix generated code in specific case involving compound ifs and child components ([#3595](https://github.com/sveltejs/svelte/issues/3595))
- Fix `bind:this` binding to a store ([#3591](https://github.com/sveltejs/svelte/issues/3591))
- Use safer `HTMLElement` check before extending class ([#3608](https://github.com/sveltejs/svelte/issues/3608))
- Add `location` as a known global ([#3619](https://github.com/sveltejs/svelte/pull/3619))
- Support `{#await}` with `{:catch}` but no `{:then}` ([#3623](https://github.com/sveltejs/svelte/issues/3623))
- Clean up dead code emitted for `<slot/>`s ([#3631](https://github.com/sveltejs/svelte/issues/3631))
- Fix tracking of dependencies of compound assignments in reactive statements ([#3634](https://github.com/sveltejs/svelte/issues/3634))
- Flush changes in newly attached block when using `{#await}` ([#3660](https://github.com/sveltejs/svelte/issues/3660))
- Throw exception immediately when calling `createEventDispatcher()` after component instantiation ([#3667](https://github.com/sveltejs/svelte/pull/3667))
- Fix globals shadowing contextual template scope ([#3674](https://github.com/sveltejs/svelte/issues/3674))
- Fix `<svelte:window>` bindings to stores ([#3832](https://github.com/sveltejs/svelte/issues/3832))
- Deconflict generated var names with builtins ([#3724](https://github.com/sveltejs/svelte/issues/3724))
- Allow spring/tweened values to be initially undefined ([#3761](https://github.com/sveltejs/svelte/issues/3761))
- Warn if using `<svelte:options tag="...">` without `customElement: true` option ([#3782](https://github.com/sveltejs/svelte/pull/3782))
- Add `Event` to list of known globals ([#3810](https://github.com/sveltejs/svelte/pull/3810))
- Throw helpful error on empty CSS declaration ([#3801](https://github.com/sveltejs/svelte/issues/3801))
- Support `easing` param on `fade` transition ([#3823](https://github.com/sveltejs/svelte/pull/3823))
- Generate valid names from filenames with unicode characters ([#3845](https://github.com/sveltejs/svelte/issues/3845))
- Don't generate any code for markup-less components ([#2200](https://github.com/sveltejs/svelte/issues/2200))
- Deconflict with internal name `block` ([#3854](https://github.com/sveltejs/svelte/issues/3854))
- Set attributes before bindings, to prevent erroneous assignments to `input.files` ([#3828](https://github.com/sveltejs/svelte/issues/3828))
- Smarter unused CSS detection ([#3825](https://github.com/sveltejs/svelte/pull/3825))
- Allow dynamic event handlers ([#3040](https://github.com/sveltejs/svelte/issues/3040))
- Prevent erroneous `"undefined"` class name ([#3876](https://github.com/sveltejs/svelte/pull/3876))
- Prevent resetting of `src` attribute unless changed ([#3579](https://github.com/sveltejs/svelte/pull/3579))
- Prevent hydration of void element 'children' ([#3882](https://github.com/sveltejs/svelte/issues/3882))
- Hoist globals even if mentioned in `<script>` block ([#3745](https://github.com/sveltejs/svelte/pull/3745))

## 3.12.1

- Escape `@` symbols in props, again ([#3545](https://github.com/sveltejs/svelte/issues/3545))

## 3.12.0

- Fire events on `document` in development to facilitate dev tooling ([#3005](https://github.com/sveltejs/svelte/pull/3005))
- Remove old props when the keys in spread props are removed ([#2282](https://github.com/sveltejs/svelte/issues/2282))

## 3.11.0

- `$capture_state` and `$inject_state` HMR hooks in dev mode ([#3148](https://github.com/sveltejs/svelte/pull/3148))
- Allow unclosed tags inside if/each/etc blocks ([#2807](https://github.com/sveltejs/svelte/issues/2807))
- Invalidate unreferenced store values inside `<script>` ([#3537](https://github.com/sveltejs/svelte/issues/3537))
- Print `null` text when hydrating ([#3379](https://github.com/sveltejs/svelte/pull/3379))

## 3.10.1

- Preserve reactivity inside if block heads etc ([#3512](https://github.com/sveltejs/svelte/issues/3512))
- Fix store bindings inside each blocks ([#3455](https://github.com/sveltejs/svelte/issues/3455))
- Generate correct code for if-else blocks with static conditions ([#3505](https://github.com/sveltejs/svelte/issues/3505))
- Avoid generating unnecessary component update code ([#3526](https://github.com/sveltejs/svelte/issues/3526))
- Make `bind:currentTime` more reliable ([#3524](https://github.com/sveltejs/svelte/issues/3524))
- Prevent errors when setting spread props on SVG elements ([#3522](https://github.com/sveltejs/svelte/issues/3522))

## 3.10.0

- Add `blur` transition ([#3477](https://github.com/sveltejs/svelte/pull/3477))
- Prevent `<input type="number">` edge case with spread props ([#3426](https://github.com/sveltejs/svelte/issues/3426))
- Robustify cyclical dependency detection, improve errors ([#3459](https://github.com/sveltejs/svelte/issues/3459))

## 3.9.2

- Fix handling of additional @-rules in style blocks ([#2995](https://github.com/sveltejs/svelte/pull/2995))
- Fix if blocks with complex but static conditions ([#3447](https://github.com/sveltejs/svelte/issues/3447))

## 3.9.1

- Only update style properties if necessary ([#3433](https://github.com/sveltejs/svelte/issues/3433))
- Only update if/await blocks if necessary ([#2355](https://github.com/sveltejs/svelte/issues/2355))
- Set context correctly inside await blocks ([#2443](https://github.com/sveltejs/svelte/issues/2443))
- Handle `!important` inline styles ([#1834](https://github.com/sveltejs/svelte/issues/1834))
- Make index references reactive in event handlers inside keyed each blocks ([#2569](https://github.com/sveltejs/svelte/issues/2569))

## 3.9.0

- Support `is` attribute on elements, with a warning ([#3182](https://github.com/sveltejs/svelte/issues/3182))
- Handle missing slot prop ([#3322](https://github.com/sveltejs/svelte/issues/3322))
- Don't set undefined/null input values, unless previous value exists ([#1233](https://github.com/sveltejs/svelte/issues/1233))
- Fix style attribute optimisation bailout ([#1830](https://github.com/sveltejs/svelte/issues/1830))

## 3.8.1

- Set SVG namespace for slotted elements ([#3321](https://github.com/sveltejs/svelte/issues/3321))

## 3.8.0

- Add `self` event modifier ([#3372](https://github.com/sveltejs/svelte/issues/3372))
- Generate valid code when spreading literal ([#3185](https://github.com/sveltejs/svelte/issues/3185))
- Coerce tag values to string before checking equality ([#2290](https://github.com/sveltejs/svelte/issues/2290))

## 3.7.1

- Assume `let` variables are dynamic for slots ([#3354](https://github.com/sveltejs/svelte/issues/3354))
- Allow transition functions to return nothing ([#2246](https://github.com/sveltejs/svelte/pull/2246))

## 3.7.0

- Disable warnings via `svelte-ignore` comments ([#3351](https://github.com/sveltejs/svelte/pull/3351))
- Throw if `$` or `$$...` is referenced as global ([#3272](https://github.com/sveltejs/svelte/issues/3272))
- Remount HTML tags correctly ([#3329](https://github.com/sveltejs/svelte/pull/3329))
- Treat data attributes like other attributes ([#3337](https://github.com/sveltejs/svelte/issues/3337))

## 3.6.11

- Handle reassigned RxJS observables ([#3304](https://github.com/sveltejs/svelte/issues/3304))
- Remove commas from HTMLified attributes with multiple chunks ([#3341](https://github.com/sveltejs/svelte/issues/3341))
- Prevent `class` on element with scoped styles from rendering as `undefined` ([#3283](https://github.com/sveltejs/svelte/issues/3283))
- Allow references to index in key expression ([#3274](https://github.com/sveltejs/svelte/issues/3274))
- Mark attribute selectors as used if corresponding binding exists ([#3281](https://github.com/sveltejs/svelte/issues/3281))
- Preserve `async`/`*` when hoisting functions ([#3179](https://github.com/sveltejs/svelte/issues/3179))
- Make `raf` a noop on server ([#3324](https://github.com/sveltejs/svelte/issues/3324))
- Prevent erroneous a11y warning for image input with alt attribute ([#3331](https://github.com/sveltejs/svelte/issues/3331))
- Add several well-known globals ([#3316](https://github.com/sveltejs/svelte/pull/3316))

## 3.6.10

- Use `change` event for file inputs ([#3226](https://github.com/sveltejs/svelte/issues/3226))
- Always fire reactive declarations with `$$props` ([#3286](https://github.com/sveltejs/svelte/issues/3286))
- More conservative spread prop updates ([#3289](https://github.com/sveltejs/svelte/issues/3289))
- Quote props if necessary in SSR mode ([#3312](https://github.com/sveltejs/svelte/issues/3312))

## 3.6.9

- Always update derived stores with a derived input whose value does not change ([#3191](https://github.com/sveltejs/svelte/issues/3191))

## 3.6.8

- Preserve global keyframes that don't match local elements ([#3228](https://github.com/sveltejs/svelte/issues/3228))
- Fix spread/`class:` combination ([#3242](https://github.com/sveltejs/svelte/pull/3242))
- Never scope `:root` selector ([#3250](https://github.com/sveltejs/svelte/pull/3250))
- Prevent trailing commas in function arguments ([#3255](https://github.com/sveltejs/svelte/pull/3260))

## 3.6.7

- Prevent corruption of outro callbacks with nested keyed each blocks ([#3209](https://github.com/sveltejs/svelte/pull/3209))
- Prevent cursor jumping in bound input in Safari ([#3199](https://github.com/sveltejs/svelte/issues/3199))
- Make resize listener object unfocusable ([#3206](https://github.com/sveltejs/svelte/issues/3206))

## 3.6.6

- Prevent dynamic components being detached twice ([#3113](https://github.com/sveltejs/svelte/issues/3113), [#2086](https://github.com/sveltejs/svelte/issues/2086))

## 3.6.5

- Handle RxJS-style observables with `get` ([#3153](https://github.com/sveltejs/svelte/issues/3153))
- Pass `let` values to bindings ([#3140](https://github.com/sveltejs/svelte/issues/3140))
- Escape `@` symbols in props ([#3173](https://github.com/sveltejs/svelte/issues/3173))
- Scale crossfaded elements ([#3175](https://github.com/sveltejs/svelte/pull/3175))

## 3.6.4

- Run `onMount` functions in correct order, and before initial `afterUpdate` functions ([#2281](https://github.com/sveltejs/svelte/issues/2281))
- Fix code transformation for shorthand methods ([#2906](https://github.com/sveltejs/svelte/issues/2906))
- Fix assignments in inline functions ([#3038](https://github.com/sveltejs/svelte/issues/3038))

## 3.6.3

- Fix await block mounting inside removed if block ([#1496](https://github.com/sveltejs/svelte/issues/1496))
- Update when element references are removed ([#2034](https://github.com/sveltejs/svelte/issues/2034))
- Don't attempt to serialize non-string values in server-rendered bindings ([#2135](https://github.com/sveltejs/svelte/issues/2135))
- Recognise dependencies in function expressions ([#2693](https://github.com/sveltejs/svelte/issues/2693))
- Scope pseudo-class selectors without class/type ([#1705](https://github.com/sveltejs/svelte/issues/1705))
- Allow nested at-rules ([#3135](https://github.com/sveltejs/svelte/issues/3135))
- Allow attributes to contain `=` characters ([#3149](https://github.com/sveltejs/svelte/pull/3149))

## 3.6.2

- Fix placement of each-else block ([#2917](https://github.com/sveltejs/svelte/issues/2917))
- Make context accessible to `bind:this` ([#2806](https://github.com/sveltejs/svelte/issues/2806))
- Pass hoisted values to slots ([#2586](https://github.com/sveltejs/svelte/issues/2586))

## 3.6.1

- Fix escaping of `@` in dev mode debug filename ([#3114](https://github.com/sveltejs/svelte/pull/3114))

## 3.6.0

- Add `innerHTML` and `textContent` bindings for `contenteditable` elements ([#2996](https://github.com/sveltejs/svelte/pull/2996))
- Fix destructuring assignments where targets are member expressions ([#3092](https://github.com/sveltejs/svelte/issues/3092))
- Deconflict with used globals ([#2963](https://github.com/sveltejs/svelte/pull/2963))
- Always run `onDestroy` functions, not just for detaching components ([#3058](https://github.com/sveltejs/svelte/issues/3058))
- Fix scope analysis around catch clauses ([#3064](https://github.com/sveltejs/svelte/issues/3064))
- Add error constructors to known globals ([#3064](https://github.com/sveltejs/svelte/issues/3064))
- Always bail out of hoisting on encountering local state in function definition ([#3044](https://github.com/sveltejs/svelte/issues/3044))
- Fix incorrect merging of top-level text nodes ([#3027](https://github.com/sveltejs/svelte/issues/3027))
- Handle removal of components in each blocks without props ([#3035](https://github.com/sveltejs/svelte/issues/3035))
- Only call subscriber once when resubscribing to a store ([#3022](https://github.com/sveltejs/svelte/issues/3022))
- Check for existence of dynamic component before introing ([#3054](https://github.com/sveltejs/svelte/issues/3054))
- Sanitize names of bubbled event handlers ([#2923](https://github.com/sveltejs/svelte/issues/2923))

## 3.5.4

- Preserve whitespace at the boundaries of `{#each}` blocks ([#713](https://github.com/sveltejs/svelte/issues/713))
- Fix dynamic `bind:this` on components ([#2333](https://github.com/sveltejs/svelte/issues/2333))
- Fix binding to values in a component when it uses `$$props` ([#2725](https://github.com/sveltejs/svelte/issues/2725))
- Fix parsing ambiguous HTML entities ([#3071](https://github.com/sveltejs/svelte/pull/3071))

## 3.5.3

- Don't double-destroy keyed each blocks with outros ([#3055](https://github.com/sveltejs/svelte/issues/3055))

## 3.5.2

- Prevent duplicated outros causing errors ([#3001](https://github.com/sveltejs/svelte/issues/3001))
- Fix automatic name generation ([#2843](https://github.com/sveltejs/svelte/issues/2843))
- Fix .d.ts stubs ([#3009](https://github.com/sveltejs/svelte/pull/3009))
- Don't strip non-breaking spaces ([#3014](https://github.com/sveltejs/svelte/issues/3014))
- Fix `requestAnimationFrame` context ([#2933](https://github.com/sveltejs/svelte/issues/2933))
- Allow space before attribute value ([#3026](https://github.com/sveltejs/svelte/issues/3026))
- Remove null/undefined attributes ([#1434](https://github.com/sveltejs/svelte/issues/1434))
- Fix whitespace in static markup ([#3030](https://github.com/sveltejs/svelte/pull/3030))

## 3.5.1

- Accommodate webpack idiosyncrasies

## 3.5.0

- Update package folder structure ([#2887](https://github.com/sveltejs/svelte/pull/2887))
- Support `once` modifier on component events ([#2654](https://github.com/sveltejs/svelte/issues/2654))
- Allow empty `<title>` tags ([#2980](https://github.com/sveltejs/svelte/issues/2980))
- Render textarea binding values inside element ([#2975](https://github.com/sveltejs/svelte/pull/2975))
- Fix delayed animation glitch ([#2871](https://github.com/sveltejs/svelte/issues/2871))
- Solve diamond dependencies problem with stores ([#2660](https://github.com/sveltejs/svelte/issues/2660))
- Fix missing outros inside each blocks ([#2689](https://github.com/sveltejs/svelte/issues/2689))
- Support animations without transitions ([#2908](https://github.com/sveltejs/svelte/issues/2908))
- Add missing transition events ([#2912](https://github.com/sveltejs/svelte/pull/2912))

## 3.4.4

- Publish type declaration files ([#2874](https://github.com/sveltejs/svelte/issues/2874))
- Don't trigger updates for unreferenced values ([#2865](https://github.com/sveltejs/svelte/pull/2865))
- Omit readonly bindings from SSR output ([#2339](https://github.com/sveltejs/svelte/issues/2339))
- Prevent outdated animation CSS ([#2871](https://github.com/sveltejs/svelte/issues/2871))
- Repair dynamic `{@html ...}` in head ([#2880](https://github.com/sveltejs/svelte/pull/2880))
- Don't create unknown prop warnings for internal props, or if component has `$$props` ([#2881](https://github.com/sveltejs/svelte/pull/2881))

## 3.4.3

- Add type declaration files for everything ([#2842](https://github.com/sveltejs/svelte/pull/2842))
- Prevent `svelte/store` being bundled ([#2786](https://github.com/sveltejs/svelte/issues/2786))
- Warn on unknown props in dev mode ([#2840](https://github.com/sveltejs/svelte/pull/2840))
- Treat `requestAnimationFrame` as a no-op on the server ([#2856](https://github.com/sveltejs/svelte/pull/2856))
- Add `raw` property to AST's `Text` nodes ([#2714](https://github.com/sveltejs/svelte/issues/2714))
- Add `<details bind:open>` ([#2854](https://github.com/sveltejs/svelte/issues/2854))

## 3.4.2

- Use empty string for empty data attributes ([#2804](https://github.com/sveltejs/svelte/pull/2804))
- Support `customElement: true` with no `<svelte:options>` ([#2821](https://github.com/sveltejs/svelte/issues/2821))
- Add docstrings to `svelte/store` ([#2795](https://github.com/sveltejs/svelte/pull/2795))

## 3.4.1

- Handle non-falsy non-function return values from derivers ([#2780](https://github.com/sveltejs/svelte/issues/2780))
- Allow `spring` to work server-side ([#2773](https://github.com/sveltejs/svelte/issues/2773))

## 3.4.0

- Allow custom element to be defined without a `tag` ([#2417](https://github.com/sveltejs/svelte/issues/2417))
- Fix parsing of quote marks inside attribute values ([#2715](https://github.com/sveltejs/svelte/pull/2754))
- Convert `svelte/store` to TypeScript ([#2733](https://github.com/sveltejs/svelte/pull/2733))
- Allow `debug` tags to include hoisted values ([#2764](https://github.com/sveltejs/svelte/issues/2764))
- Parse error if attribute name is missing `=` ([#1513](https://github.com/sveltejs/svelte/pull/2770))
- Allow reactive declarations to depend on mutated `const` values ([#2728](https://github.com/sveltejs/svelte/issues/2728))

## 3.3.0

- Allow multiple event listeners on a single node ([#2688](https://github.com/sveltejs/svelte/issues/2688))
- Allow derivers to return a cleanup function ([#2553](https://github.com/sveltejs/svelte/issues/2553))
- Support namespaced components (`<Foo.Bar/>`) ([#2743](https://github.com/sveltejs/svelte/pull/2743))

## 3.2.2

- Add `window` and `document` to expected globals ([#2722](https://github.com/sveltejs/svelte/pull/2722))
- Prevent hoisting of functions that depend on reactive state ([#2703](https://github.com/sveltejs/svelte/pull/2703))
- Generate correct code when slot has no changes ([#2697](https://github.com/sveltejs/svelte/issues/2697))
- Prevent `Object.prototype`-related bugs ([#2696](https://github.com/sveltejs/svelte/pull/2696))

## 3.2.1

- Use same comparison logic for `derived` as for other stores ([#2644](https://github.com/sveltejs/svelte/issues/2644))
- Invalidate dependencies of reactive declarations ([#2444](https://github.com/sveltejs/svelte/issues/2444))
- Fix instrumentation of auto-subscription self-assignments ([#2681](https://github.com/sveltejs/svelte/issues/2681))
- Warn on non-top-level or module-context statements labeled with `$:` ([#2176](https://github.com/sveltejs/svelte/issues/2176))

## 3.2.0

- Improve `spring` animations, and add `hard`/`soft` options ([#2627](https://github.com/sveltejs/svelte/pull/2627))
- Expose `parse` and `walk` functions ([#2661](https://github.com/sveltejs/svelte/issues/2661), [#2534](https://github.com/sveltejs/svelte/pull/2534))
- Support array/object rest in `each` block destructuring patterns ([#2647](https://github.com/sveltejs/svelte/issues/2647), [#2658](https://github.com/sveltejs/svelte/pull/2658))
- Use `setAttribute` to change `form` property on form elements ([#1742](https://github.com/sveltejs/svelte/issues/1742))
- Fix a11y warning when `<figcaption>` is non-direct descendant of `<figure>` ([#2582](https://github.com/sveltejs/svelte/issues/2582))
- Squelch erroneous 'empty block' warnings ([#1716](https://github.com/sveltejs/svelte/issues/1716))
- Fix IE9/10 error with `insertBefore` ([#2573](https://github.com/sveltejs/svelte/issues/2573))
- Prevent `$$scope` from being spread onto an element ([#2520](https://github.com/sveltejs/svelte/issues/2520))
- Resubscribe to stores that are assigned to in `<script>` ([#2435](https://github.com/sveltejs/svelte/issues/2435))
- Allow reactive declarations to depend on `const` variables ([#2285](https://github.com/sveltejs/svelte/issues/2285))
- Trigger store changes on UpdateExpression ([#2625](https://github.com/sveltejs/svelte/issues/2625))
- Squelch missing prop warning if variable is initialised ([#2635](https://github.com/sveltejs/svelte/issues/2635))
- Add `alert`, `confirm` and `prompt` to known globals ([#2648](https://github.com/sveltejs/svelte/issues/2648))

## 3.1.0

- Allow store subscribe functions to return an object with an `unsubscribe` method, providing native RxJS support ([#2549](https://github.com/sveltejs/svelte/issues/2549))

## 3.0.1

- Prevent text input cursor jumping in Safari ([#2506](https://github.com/sveltejs/svelte/issues/2506))
- Allow assignments to member expressions ([#2510](https://github.com/sveltejs/svelte/issues/2510))
- Prevent mutually dependent functions causing an infinite during hoisting ([#2542](https://github.com/sveltejs/svelte/issues/2542))
- Reuse scheduler promise instead of creating new one each time ([#2555](https://github.com/sveltejs/svelte/pull/2555))
- Various site/docs fixes

## 3.0.0

- Everything

## 2.15.4

- IE `classList` fix ([#1868](https://github.com/sveltejs/svelte/pull/1868))

## 2.15.3

- Don't mutate AST

## 2.15.2

- Expose `stats.props` ([#1837](https://github.com/sveltejs/svelte/issues/1837))

## 2.15.1

- Don't throw missing store error when store is declared in component ([#1828](https://github.com/sveltejs/svelte/issues/1828))

## 2.15.0

- Event modifiers ([#1088](https://github.com/sveltejs/svelte/issues/1088))
- Wheel and touch events are passive by default ([#1088](https://github.com/sveltejs/svelte/issues/1088))
- Add `<svelte:document>` tag ([#1484](https://github.com/sveltejs/svelte/issues/1484))
- Include binding values in server-rendered HTML ([#1205](https://github.com/sveltejs/svelte/issues/1205))
- Remove attributes when value is undefined/null ([#1434](https://github.com/sveltejs/svelte/issues/1434))
- Initialise window scroll from component data ([#938](https://github.com/sveltejs/svelte/issues/938))
- Remove references to unused properties in generated code ([#1187](https://github.com/sveltejs/svelte/issues/1187))
- Add TypeScript definitions for store ([#1207](https://github.com/sveltejs/svelte/issues/1207))
- Better error for missing store ([#1807](https://github.com/sveltejs/svelte/issues/1807))

## 2.14.3

- Account for directive dependencies ([#1793](https://github.com/sveltejs/svelte/issues/1793))
- Detach each block iterations in each blocks with no update method ([#1795](https://github.com/sveltejs/svelte/issues/1795))

## 2.14.2

- Fix issue with nested `{#if}` blocks ([#1780](https://github.com/sveltejs/svelte/issues/1780))

## 2.14.1

- Fix block insertion order regression ([#1778](https://github.com/sveltejs/svelte/issues/1778))
- Fix blocks inside `<svelte:head>` ([#1774](https://github.com/sveltejs/svelte/issues/1774))
- Better attribute parsing ([#1772](https://github.com/sveltejs/svelte/issues/1772))
- Fix parse errors inside directives ([#1788](https://github.com/sveltejs/svelte/issues/1788))

## 2.14.0

- Refactor internals ([#1678](https://github.com/sveltejs/svelte/issues/1678))
- Deprecate `onerror` option ([#1745](https://github.com/sveltejs/svelte/issues/1745))
- Handle edge cases where `destroy` is called before `mount` ([#1653](https://github.com/sveltejs/svelte/pull/1653))
- Make `scroll` binding more efficient ([#1579](https://github.com/sveltejs/svelte/pull/1770))
- Make 'readonly property' store error more informative ([#1761](https://github.com/sveltejs/svelte/pull/1761))

## 2.13.5

- Fix missing dependencies in shorthand class directives ([#1739](https://github.com/sveltejs/svelte/issues/1739))

## 2.13.4

- Support dynamic `import()` in template expressions

## 2.13.3

- Fix bug with keyed each blocks and nested components ([#1706](https://github.com/sveltejs/svelte/issues/1706))

## 2.13.2

- Coalesce simultaneous store/component updates ([#1520](https://github.com/sveltejs/svelte/issues/1520))
- Fix nested transitions preventing each block item removal ([#1617](https://github.com/sveltejs/svelte/issues/1617))
- Add `class` directive shorthand and encapsulate styles ([#1695](https://github.com/sveltejs/svelte/pull/1695))
- Prevent erroneous updates of bound inputs ([#1699](https://github.com/sveltejs/svelte/issues/1699))

## 2.13.1

- Coerce second argument to `toggleClass` ([#1685](https://github.com/sveltejs/svelte/issues/1685))

## 2.13.0

- Add `class` directive ([#890](https://github.com/sveltejs/svelte/issues/890))
- Remove sourcemaps from npm package ([#1690](https://github.com/sveltejs/svelte/pull/1690))

## 2.12.1

- Allow actions to take any expression ([#1676](https://github.com/sveltejs/svelte/issues/1676))
- Run transitions in component context ([#1675](https://github.com/sveltejs/svelte/issues/1675))
- Correctly set select value on mount ([#1666](https://github.com/sveltejs/svelte/issues/1666))
- Support `{@debug}` in SSR ([#1659](https://github.com/sveltejs/svelte/issues/1659))
- Don't treat `&nbsp;` as empty whitespace ([#1658](https://github.com/sveltejs/svelte/issues/1658))
- Fix outros for if blocks with no else ([#1688](https://github.com/sveltejs/svelte/pull/1688))
- Set `style.cssText` in spread attributes ([#1684](https://github.com/sveltejs/svelte/pull/1684))

## 2.12.0

- Initialise actions on mount rather than hydrate ([#1653](https://github.com/sveltejs/svelte/pull/1653))
- Allow nonexistent components to be destroyed ([#1677](https://github.com/sveltejs/svelte/pull/1677))
- Pass AMD ID from CLI correctly ([#1672](https://github.com/sveltejs/svelte/pull/1672))
- Minor AST tweaks ([#1673](https://github.com/sveltejs/svelte/pull/1673), [#1674](https://github.com/sveltejs/svelte/pull/1674))
- Reduce code duplication in component initialisation ([#1670](https://github.com/sveltejs/svelte/pull/1670))

## 2.11.0

- Add `--shared` CLI option ([#1649](https://github.com/sveltejs/svelte/pull/1649))
- Run first `onstate` _before_ fragment is rendered ([#1522](https://github.com/sveltejs/svelte/issues/1522))
- Exclude current computed prop from state object ([#1544](https://github.com/sveltejs/svelte/issues/1544))

## 2.10.1

- Add sourcemaps to `{@debug}` tags ([#1647](https://github.com/sveltejs/svelte/pull/1647))

## 2.10.0

- Add a `{@debug}` tag, for inspecting values in templates in dev mode ([#1635](https://github.com/sveltejs/svelte/issues/1635))
- Fix dimension bindings in iOS ([#1642](https://github.com/sveltejs/svelte/pull/1642))

## 2.9.11

- Pass props to custom elements rather than setting attributes, where appropriate ([#875](https://github.com/sveltejs/svelte/issues/875))
- Handle whitespace in lists consistently between SSR and DOM renderers ([#1637](https://github.com/sveltejs/svelte/pull/1637))
- Improve error for invalid `ref` names ([#1613](https://github.com/sveltejs/svelte/issues/1613))

## 2.9.10

- Handle `null` consistently in tags ([#1598](https://github.com/sveltejs/svelte/issues/1598))
- Support object rest in computed properties ([#1540](https://github.com/sveltejs/svelte/issues/1540))
- Always update dynamic components when expression changes ([#1621](https://github.com/sveltejs/svelte/issues/1621))
- Encapsulate local styles inside global styles ([#1618](https://github.com/sveltejs/svelte/issues/1618))

## 2.9.9

- Fix attribute name regex ([#1623](https://github.com/sveltejs/svelte/pull/1623))

## 2.9.8

- Sanitize spread attributes in SSR — fixes vulnerability CVE-2018-6341 ([#1623](https://github.com/sveltejs/svelte/pull/1623))

## 2.9.7

- Allow `<input type=file bind:files>` ([#1608](https://github.com/sveltejs/svelte/issues/1608))
- Ensure child window exists before removing listener in `addResizeHandler` ([#1600](https://github.com/sveltejs/svelte/issues/1600))
- Handle transitions in `else` block ([#1589](https://github.com/sveltejs/svelte/issues/1589))

## 2.9.6

- Provide more useful error if SSR component attempts to render non-SSR component ([#1605](https://github.com/sveltejs/svelte/issues/1605))

## 2.9.5

- Null out refs to dynamic components ([#1596](https://github.com/sveltejs/svelte/issues/1596))

## 2.9.4

- Make identifier optional for `then` and `catch` blocks ([#1507](https://github.com/sveltejs/svelte/issues/1507))
- Group outros correctly ([#1575](https://github.com/sveltejs/svelte/issues/1575))

## 2.9.3

- Fix bug when an each block contains transitions but its else branch does not ([#1559](https://github.com/sveltejs/svelte/issues/1559))
- If an event handler throws an exception, don't block all future calls to that handler ([#1573](https://github.com/sveltejs/svelte/issues/1573))

## 2.9.2

- Fix conflict when using multiple if-else blocks, some of which use outros and some of which do not ([#1580](https://github.com/sveltejs/svelte/issues/1580))
- Fix some cases where `.innerHTML` was being used to create child elements when it shouldn't ([#1581](https://github.com/sveltejs/svelte/issues/1581))

## 2.9.1

- Use `template.content` instead of `template` where appropriate ([#1571](https://github.com/sveltejs/svelte/issues/1571))

## 2.9.0

- Play outro transitions on `<svelte:component>` if `nestedTransitions` is true ([#1568](https://github.com/sveltejs/svelte/issues/1568))
- Allow illegal identifiers to be component prop names, for e.g. spreading `data-foo` props ([#887](https://github.com/sveltejs/svelte/issues/887))
- Abort transition when node is detached ([#1561](https://github.com/sveltejs/svelte/issues/1561))
- Only include `transitionManager` when necessary ([#1514](https://github.com/sveltejs/svelte/issues/1514))

## 2.8.1

- Fix prefixed animation name replacement ([#1556](https://github.com/sveltejs/svelte/pull/1556))

## 2.8.0

- Correctly set store on nested components (to parent store, not root store) ([#1538](https://github.com/sveltejs/svelte/issues/1538))

## 2.7.2

- Prevent unnecessary remounts ([#1527](https://github.com/sveltejs/svelte/issues/1527))
- Allow `refs.*` as callee ([#1526](https://github.com/sveltejs/svelte/pull/1526))
- Handle empty lists when outroing ([#1532](https://github.com/sveltejs/svelte/issues/1532))

## 2.7.1

- Fix spread props with multiple dependencies ([#1515](https://github.com/sveltejs/svelte/issues/1515))

## 2.7.0

- Add `__svelte_meta` object to elements in dev mode, containing source info ([#1499](https://github.com/sveltejs/svelte/issues/1499))
- Fix `bind:online` in dev mode ([#1502](https://github.com/sveltejs/svelte/issues/1502))
- Update v1 warnings/errors ([#1508](https://github.com/sveltejs/svelte/pull/1508))
- Transform prefixed keyframes ([#1504](https://github.com/sveltejs/svelte/issues/1504))

## 2.6.6

- Fix nested transition bug ([#1497](https://github.com/sveltejs/svelte/issues/1497))

## 2.6.5

- Handle cases where only some `if` block branches have outros ([#1492](https://github.com/sveltejs/svelte/issues/1492))

## 2.6.4

- Web worker support ([#1487](https://github.com/sveltejs/svelte/issues/1487))
- Update dynamic component bindings when component changes ([#1489](https://github.com/sveltejs/svelte/issues/1489))

## 2.6.3

- Nested transitions respect `skipIntroByDefault` ([#1460](https://github.com/sveltejs/svelte/issues/1460))
- Always create outro for top-level block ([#1470](https://github.com/sveltejs/svelte/issues/1470))

## 2.6.2

- Fix spread+bindings on dynamic components ([#1433](https://github.com/sveltejs/svelte/issues/1433))
- Abort in-progress animations, if a new one starts ([#1458](https://github.com/sveltejs/svelte/issues/1458))
- Allow animations to be parameterised ([#1462](https://github.com/sveltejs/svelte/issues/1462))

## 2.6.1

- Absolutely position outroing animated nodes ([#1457](https://github.com/sveltejs/svelte/pull/1457))

## 2.6.0

- Add `animate` directive ([#1454](https://github.com/sveltejs/svelte/pull/1454))
- Add `skipIntroByDefault` compiler option and `intro: true` init option ([#1448](https://github.com/sveltejs/svelte/pull/1448))
- Add `nestedTransitions` compiler option ([#1451](https://github.com/sveltejs/svelte/pull/1451))
- Component outros, if `nestedTransitions` is true ([#1211](https://github.com/sveltejs/svelte/issues/1211))
- Allow transition functions to return a function, for inter-transition coordination ([#1453](https://github.com/sveltejs/svelte/pull/1453))
- Pass `1 - t` as second argument to transition functions ([#1452](https://github.com/sveltejs/svelte/pull/1452))

## 2.5.1

- Add new ARIA attributes ([#1436](https://github.com/sveltejs/svelte/pull/1436))
- Add `Promise` to whitelisted globals ([#1441](https://github.com/sveltejs/svelte/issues/1441))
- Allow spaces around reserved keyword attributes ([#1445](https://github.com/sveltejs/svelte/issues/1445))

## 2.5.0

- Support transitions in `await` blocks ([#956](https://github.com/sveltejs/svelte/issues/956))
- Abort outros if block is recreated ([#1425](https://github.com/sveltejs/svelte/issues/1425))
- Wait until transitions have completed before removing styles ([#648](https://github.com/sveltejs/svelte/issues/648))
- Support event shorthand on dynamic components ([#1427](https://github.com/sveltejs/svelte/pull/1427))
- Various codegen improvements ([#1419](https://github.com/sveltejs/svelte/pull/1419), [#1421](https://github.com/sveltejs/svelte/pull/1421), [#1422](https://github.com/sveltejs/svelte/pull/1422), [#1424](https://github.com/sveltejs/svelte/pull/1424))
- Correctly handle `await` blocks with no dynamic content ([#1417](https://github.com/sveltejs/svelte/issues/1417))
- Allow spread props on elements with static attribute tests ([#1429](https://github.com/sveltejs/svelte/pull/1429))

## 2.4.4

- Declare missing variable in Store ([#1415](https://github.com/sveltejs/svelte/issues/1415))
- ALways declare spread levels ([#1413](https://github.com/sveltejs/svelte/issues/1413))

## 2.4.3

- `ref` directives prevent HTMLified content ([#1407](https://github.com/sveltejs/svelte/issues/1407))
- Store computed properties update components immediately upon declaration ([#1327](https://github.com/sveltejs/svelte/issues/1327))

## 2.4.2

- Evaluate `each` key in child scope ([#1397](https://github.com/sveltejs/svelte/issues/1397))
- Prevent false negatives and positives when detecting cyclical computed store properties ([#1399](https://github.com/sveltejs/svelte/issues/1399))
- Only update dynamic component props ([#1394](https://github.com/sveltejs/svelte/issues/1394))

## 2.4.1

- Fix DOM event context ([#1390](https://github.com/sveltejs/svelte/issues/1390))

## 2.4.0

- Integrate CLI ([#1360](https://github.com/sveltejs/svelte/issues/1360))
- Allow arbitrary destructuring for each block items, with binding ([#1385](https://github.com/sveltejs/svelte/pull/1385))
- Each block keys can use arbitrary expressions ([#703](https://github.com/sveltejs/svelte/issues/703))
- `bind:offsetWidth`, `bind:offsetHeight`, `bind:clientWidth` and `bind:clientHeight` ([#984](https://github.com/sveltejs/svelte/issues/984))
- Leaner generated code for `each` blocks ([#1287](https://github.com/sveltejs/svelte/issues/1287))

## 2.3.0

- Allow computed properties to have entire state object as dependency ([#1303](https://github.com/sveltejs/svelte/issues/1303))
- Fix `stats` when `options.generate` is `false` ([#1368](https://github.com/sveltejs/svelte/issues/1368))
- Assign custom methods to custom elements ([#1369](https://github.com/sveltejs/svelte/issues/1369))
- Fix `this` value in custom event handlers ([#1297](https://github.com/sveltejs/svelte/issues/1297))
- Re-evaluate `each` values lazily ([#1286](https://github.com/sveltejs/svelte/issues/1286))
- Preserve outer context in `await` blocks ([#1251](https://github.com/sveltejs/svelte/issues/1251))

## 2.2.0

- Internal refactoring ([#1367](https://github.com/sveltejs/svelte/pull/1367))

## 2.1.1

- Report initial `changed` based on state, not expected props ([#1356](https://github.com/sveltejs/svelte/issues/1356))
- Set state to empty object, not null, on destroy ([#1354](https://github.com/sveltejs/svelte/issues/1354))
- Prevent stale state in component event handlers ([#1353](https://github.com/sveltejs/svelte/issues/1353))

## 2.1.0

- Allow shorthand imports ([#1038](https://github.com/sveltejs/svelte/issues/1038))
- Update spread props inside each blocks ([#1337](https://github.com/sveltejs/svelte/issues/1337))

## 2.0.0

_See [the blog post](https://svelte.dev/blog/version-2) for information on how to upgrade your apps_

- New template syntax ([#1318](https://github.com/sveltejs/svelte/issues/1318))
- Emit ES2015 code, not ES5 ([#1348](https://github.com/sveltejs/svelte/pull/1348))
- Add `onstate` and `onupdate` hooks, remove `component.observe` method ([#1197](https://github.com/sveltejs/svelte/issues/1197))
- Use destructuring syntax for computed properties ([#1069](https://github.com/sveltejs/svelte/issues/1069)
- Change signature of `svelte.compile` ([#1298](https://github.com/sveltejs/svelte/pull/1298))
- Remove `validate` and `Stylesheet` from public API ([#1348](https://github.com/sveltejs/svelte/pull/1348))
- Don't typecast numeric attributes ([#657](https://github.com/sveltejs/svelte/issues/657))
- Always compile with `Store` support, and cascading disabled ([#1348](https://github.com/sveltejs/svelte/pull/1348))
- Remove unused `hash` property from AST ([#1348](https://github.com/sveltejs/svelte/pull/1348))
- Rename `loc` property to `start` in warnings and errors ([#1348](https://github.com/sveltejs/svelte/pull/1348))

## 1.64.1

- Fix computed properties in SSR renderer ([#1349](https://github.com/sveltejs/svelte/issues/1349))

## 1.64.0

- Deprecate passing a string argument to `component.get` ([#1347](https://github.com/sveltejs/svelte/pull/1347))

## 1.63.1

- Allow `observe` method to be overwritten

## 1.63.0

- Add `onstate` and `onupdate` lifecycle hooks and deprecate `component.observe` ([#1197](https://github.com/sveltejs/svelte/issues/1197))
- Add `on` and `fire` to `Store`, deprecate `onchange` and `observe` ([#1344](https://github.com/sveltejs/svelte/pull/1344))
- Require computed properties to have destructured argument in v2 mode ([#1069](https://github.com/sveltejs/svelte/issues/1069))

## 1.62.0

- Add a `code` field to errors and warnings ([#474](https://github.com/sveltejs/svelte/issues/474))
- When using v2 syntax, do not use interpolation in non-root `<style>` tags ([#1339](https://github.com/sveltejs/svelte/issues/1339))

## 1.61.0

- Support v2 syntax with `parser: 'v2'` option ([#1318](https://github.com/sveltejs/svelte/issues/1318))

## 1.60.3

- Fix validation of `multiple` attributes on bound `<select>` elements ([#1331](https://github.com/sveltejs/svelte/issues/1331))

## 1.60.2

- Fix order of insertions for keyed each blocks with siblings ([#1306](https://github.com/sveltejs/svelte/issues/1306))
- Bail out of CSS DCE if element has spread attribute ([#1300](https://github.com/sveltejs/svelte/issues/1300))
- Allow `console` etc in component events ([#1278](https://github.com/sveltejs/svelte/issues/1278))
- Deconflict against inherited contexts ([#1275](https://github.com/sveltejs/svelte/issues/1275))
- Make CSS DCE case insensitive ([#1269](https://github.com/sveltejs/svelte/issues/1269))
- Error on dynamic `multiple` attribute for bound select ([#1270](https://github.com/sveltejs/svelte/issues/1270))
- Allow custom events on `<:Window>` ([#1268](https://github.com/sveltejs/svelte/issues/1268))

## 1.60.1

- Fix spread updates on dynamic components ([#1307](https://github.com/sveltejs/svelte/issues/1307))

## 1.60.0

- Spread properties ([#195](https://github.com/sveltejs/svelte/issues/195))
- `svelte.compile` returns an object with `{ js, css, ast }` properties, where `js` and `css` are `{ code, map }` objects ([#1298](https://github.com/sveltejs/svelte/pull/1298))
- Fixed broken compile errors when using Rollup ([#1296](https://github.com/sveltejs/svelte/pull/1296))

## 1.59.0

- Deprecate `teardown` in custom event handlers ([#531](https://github.com/sveltejs/svelte/issues/531))
- Allow static content in keyed `each` block ([#1291](https://github.com/sveltejs/svelte/issues/1291))
- Allow empty content in keyed `each` block ([#1295](https://github.com/sveltejs/svelte/issues/1295))
- Only delete applicable transitions ([#1290](https://github.com/sveltejs/svelte/issues/1290))

## 1.58.5

- Allow backtick string literals for `svg`, `tag`, and `props` properties ([#1284](https://github.com/sveltejs/svelte/issues/1284))
- Fix removal of transition styles under Firefox ([#1288](https://github.com/sveltejs/svelte/pull/1288))

## 1.58.4

- Fix initial state regression ([#1283](https://github.com/sveltejs/svelte/pull/1283))

## 1.58.3

- Actions run in the context of the component ([#1279](https://github.com/sveltejs/svelte/pull/1279))
- Set refs when mounting dynamic components ([#1280](https://github.com/sveltejs/svelte/pull/1280))

## 1.58.2

- (1.58.1 failed to publish)

## 1.58.1

- Actions ([#1247](https://github.com/sveltejs/svelte/pull/1247))
- Support `preserveComments` option in SSR mode ([#1265](https://github.com/sveltejs/svelte/issues/1265))
- Fix performance regression ([#1274](https://github.com/sveltejs/svelte/pull/1274))

## 1.58.0

- Fast row swapping ([#588](https://github.com/sveltejs/svelte/issues/588))
- Better error messages for invalid directives ([#1242](https://github.com/sveltejs/svelte/pull/1242))
- Fix local context variable bugs ([#1240](https://github.com/sveltejs/svelte/pull/1243), [#1254](https://github.com/sveltejs/svelte/pull/1254))
- Skip missing property warnings for computed/global properties in dev mode ([#1246](https://github.com/sveltejs/svelte/pull/1246))
- Add end position to warnings ([#1250](https://github.com/sveltejs/svelte/pull/1250))

## 1.57.4

- Deconflict context names ([#1229](https://github.com/sveltejs/svelte/issues/1229))
- Use `setAttribute` to set input types ([#1209](https://github.com/sveltejs/svelte/issues/1209))
- Scale transition duration correctly ([#1221](https://github.com/sveltejs/svelte/issues/1221))

## 1.57.3

- Fix scoped CSS on static child elements ([#1223](https://github.com/sveltejs/svelte/issues/1223))

## 1.57.2

- Fix scoped CSS on SVG elements ([#1224](https://github.com/sveltejs/svelte/issues/1224))

## 1.57.1

- Add each_value to contextProps ([#1206](https://github.com/sveltejs/svelte/issues/1206))

## 1.57.0

- Use classes (not attributes) for style encapsulation, and base36-encode hashes ([#1118](https://github.com/sveltejs/svelte/issues/1118))

## 1.56.4

- Allow `component` and `state` to be context names ([#1213](https://github.com/sveltejs/svelte/issues/1213))
- Don't remove `@supports` rules when `cascade: false` ([#1215](https://github.com/sveltejs/svelte/issues/1215))

## 1.56.3

- Top-level transitions work inside nested components ([#1188](https://github.com/sveltejs/svelte/issues/1188))
- Always use internal `_mount` method ([#1201](https://github.com/sveltejs/svelte/issues/1201))

## 1.56.2

- Null out `key` for children of keyed each blocks ([#1202](https://github.com/sveltejs/svelte/issues/1202))

## 1.56.1

- Fix if-in-each bug ([#1195](https://github.com/sveltejs/svelte/issues/1195))
- Cross-browser `scrollX`/`scrollY` support ([#1175](https://github.com/sveltejs/svelte/issues/1175))

## 1.56.0

- Internal refactor ([#1122](https://github.com/sveltejs/svelte/issues/1122))
- Use correct context for component events ([#1184](https://github.com/sveltejs/svelte/issues/1184))
- Allow observing `$foo` in dev mode ([#1181](https://github.com/sveltejs/svelte/issues/1181))
- Handle dynamic data in default slot ([#1144](https://github.com/sveltejs/svelte/issues/1144))

## 1.55.1

- Fix cancellation of store `onchange` handlers ([#1177](https://github.com/sveltejs/svelte/issues/1177))
- Write `["default"]` instead of `.default` in legacy mode ([#1166](https://github.com/sveltejs/svelte/issues/1166))
- Upgrade Acorn ([#1182](https://github.com/sveltejs/svelte/pull/1182))
- Don't warn about capitalisation if `options.name` begins with non-alphabetical character ([#1179](https://github.com/sveltejs/svelte/pull/1179))

## 1.55.0

- Add `immutable` compiler option for Svelte and runtime option for `Store` ([#1146](https://github.com/sveltejs/svelte/issues/1146))
- Fix component store bindings ([#1100](https://github.com/sveltejs/svelte/issues/1100))
- Fire `oncreate` when custom element is attached ([#1117](https://github.com/sveltejs/svelte/issues/1117))
- Downgrade empty blocks to a warning ([#1156](https://github.com/sveltejs/svelte/pull/1156))
- Error on unclosed comment ([#1156](https://github.com/sveltejs/svelte/pull/1156))

## 1.54.2

- Prevent `await` blocks using stale state ([#1131](https://github.com/sveltejs/svelte/issues/1131))
- Prevent erroneous missing data warnings for custom elements ([#1065](https://github.com/sveltejs/svelte/issues/1065))
- Remove empty selectors in prod mode ([#1138](https://github.com/sveltejs/svelte/issues/1138))
- Escape attribute values in SSR mode ([#1155](https://github.com/sveltejs/svelte/pull/1155))
- Remove `<noscript>` elements in DOM mode ([#1108](https://github.com/sveltejs/svelte/issues/1108))
- Allow hydration of non-root `<script>`/`<style>` tags ([#1163](https://github.com/sveltejs/svelte/pull/1163))
- Allow interpolation in non-root `<style>` tags ([#1163](https://github.com/sveltejs/svelte/pull/1163))

## 1.54.1

- Hoist destructured references ([#1139](https://github.com/sveltejs/svelte/issues/1139))
- Add `bind:volume` for media elements ([#1143](https://github.com/sveltejs/svelte/issues/1143))

## 1.54.0

- Run `oncreate` hooks depth-first, top-to-bottom ([#1135](https://github.com/sveltejs/svelte/issues/1135))
- Render boolean attributes correctly in SSR mode ([#1109](https://github.com/sveltejs/svelte/issues/1109))
- Add `feed` aria role to expected roles when doing a11y checks ([#1124](https://github.com/sveltejs/svelte/pull/1124))
- More complete fix for case sensitive attributes ([#1062](https://github.com/sveltejs/svelte/issues/1062))
- Handle CLRF line endings in await block comments ([#1132](https://github.com/sveltejs/svelte/issues/1132))

## 1.53.0

- Base scoping selectors on `<style>` contents alone ([#1091](https://github.com/sveltejs/svelte/issues/1091))

## 1.52.0

- Deconflict referenced globals ([#1079](https://github.com/sveltejs/svelte/issues/1079))
- Validate contents of `await` blocks ([#1061](https://github.com/sveltejs/svelte/issues/1061))
- Fire `oncreate` for components in `await` blocks ([#1061](https://github.com/sveltejs/svelte/issues/1061))
- Automatically fix attribute casing ([#1062](https://github.com/sveltejs/svelte/issues/1062))
- Fix escaping in `<script>` and `<style>` ([#1082](https://github.com/sveltejs/svelte/issues/1082))
- Error if invalid characters are used in computed properties, and allow any valid identifier in props ([#1083](https://github.com/sveltejs/svelte/issues/1083))
- Don't run a11y tests on components ([#1110](https://github.com/sveltejs/svelte/issues/1110))
- Respect `store` option in SSR mode ([#1107](https://github.com/sveltejs/svelte/issues/1107))

## 1.51.1

- Only escape <, > and & characters ([#1082](https://github.com/sveltejs/svelte/issues/1082))

## 1.51.0

- Lock `scroll` bindings ([#1071](https://github.com/sveltejs/svelte/issues/1071))
- Escape HTML entities when compiling to static HTML ([#1066](https://github.com/sveltejs/svelte/issues/1066))
- Apply a11y warnings to SVG `<a>` attributes with `xlink:href` ([#1008](https://github.com/sveltejs/svelte/issues/1008))

## 1.50.1

- Prevent main fragment being created twice in custom elements ([#1064](https://github.com/sveltejs/svelte/pull/1064))

## 1.50.0

- Detect unused/misplaced components ([#1039](https://github.com/sveltejs/svelte/issues/1039))
- Warn on unused event definitions/transitions ([#1051](https://github.com/sveltejs/svelte/issues/1051))
- Remove whitespace inside `<:Head>` ([#1026](https://github.com/sveltejs/svelte/issues/1026))
- Optimise `<title>` ([#1027](https://github.com/sveltejs/svelte/issues/1027))
- Add `bind: false` option to disable two-way binding ([#54](https://github.com/sveltejs/svelte/issues/54))

## 1.49.3

- Return `html` from SSR compiler `render().toString()` methods ([#1044](https://github.com/sveltejs/svelte/issues/1044))
- Correctly reinitialise dynamic components ([#1040](https://github.com/sveltejs/svelte/issues/1040))
- Allow `<option>` outside `<select>` ([#1022](https://github.com/sveltejs/svelte/issues/1022))
- Fix data references in await-block event handlers ([#1032](https://github.com/sveltejs/svelte/issues/1032))

## 1.49.2

- Add `store.umd.js` ([#967](https://github.com/sveltejs/svelte/issues/967))
- Warn on use of `this` inside computed properties ([#1033](https://github.com/sveltejs/svelte/pull/1033))

## 1.49.1

- Pass `store` to children in SSR mode ([#1029](https://github.com/sveltejs/svelte/pull/1029))

## 1.49.0

- Support `store` as a component property ([#1028](https://github.com/sveltejs/svelte/pull/1028))

## 1.48.0

- Added `<:Head>` component for injecting contents into document head ([#1013](https://github.com/sveltejs/svelte/issues/1013)))
- SSR `render(...)` method now returns a `{ html, css: { code, map }, head }` object ([#1013](https://github.com/sveltejs/svelte/issues/1013))
- SSR `renderCss(...)` method is deprecated ([#1013](https://github.com/sveltejs/svelte/issues/1013))
- Add a `preload` function to components ([#1015](https://github.com/sveltejs/svelte/issues/1015))
- Expose `this.root` on nested components ([#1023](https://github.com/sveltejs/svelte/pull/1023))

## 1.47.2

- Deconflict computed properties against arguments to `_recompute` ([#1012](https://github.com/sveltejs/svelte/issues/1012))
- Allow `await` blocks in slots ([#1018](https://github.com/sveltejs/svelte/issues/1018))
- Allow components without slots to have whitespace as only child ([#1007](https://github.com/sveltejs/svelte/issues/1007))
- Correctly set `toString` on `CompileError` ([#1016](https://github.com/sveltejs/svelte/pull/1016))

## 1.47.1

- Sanitize filenames in SSR mode ([#1005](https://github.com/sveltejs/svelte/issues/1005))

## 1.47.0

- Support dynamic `import(...)` inside `<script>` tags ([#1003](https://github.com/sveltejs/svelte/issues/1003))

## 1.46.1

- `await...then` shorthand ([#957](https://github.com/sveltejs/svelte/issues/957))
- Allow dynamic components inside elements ([#993](https://github.com/sveltejs/svelte/issues/993))
- Don't use `dataset` on SVG nodes ([#982](https://github.com/sveltejs/svelte/issues/982))
- Fix erroneous `<figcaption>` a11y warning ([#991](https://github.com/sveltejs/svelte/issues/991))
- Handle empty classes when pruning unused selectors ([#978](https://github.com/sveltejs/svelte/issues/978))
- Better trimming of SSR'd output ([#976](https://github.com/sveltejs/svelte/issues/976))
- Don't add `event` to `expectedProperties` ([#972](https://github.com/sveltejs/svelte/issues/972))
- Emit error on bad `set` arguments in dev mode ([#990](https://github.com/sveltejs/svelte/issues/990))

## 1.46.0

- Pass `filename` through to preprocessors ([#983](https://github.com/sveltejs/svelte/issues/983))

## 1.45.0

- Dynamic components ([#971](https://github.com/sveltejs/svelte/pull/971))

## 1.44.2

- Fix `await` blocks with siblings ([#974](https://github.com/sveltejs/svelte/issues/974))
- Fix `await` blocks inside `if` blocks ([#975](https://github.com/sveltejs/svelte/issues/975))

## 1.44.1

- Fix bidirectional transitions that reference state ([#962](https://github.com/sveltejs/svelte/issues/962))

## 1.44.0

- Add `svelte.preprocess` ([#181](https://github.com/sveltejs/svelte/issues/181), [#876](https://github.com/sveltejs/svelte/issues/876))
- Add `{{#await ...}}` blocks ([#654](https://github.com/sveltejs/svelte/issues/654))

## 1.43.1

- Fix parameterised transitions ([#962](https://github.com/sveltejs/svelte/issues/962))
- Prevent boolean attributes breaking estree-walker expectations ([#961](https://github.com/sveltejs/svelte/issues/961))
- Throw error on cyclical store computations ([#964](https://github.com/sveltejs/svelte/pull/964))

## 1.43.0

- Export `Store` class to manage global state ([#930](https://github.com/sveltejs/svelte/issues/930))
- Recognise `aria-current` ([#953](https://github.com/sveltejs/svelte/pull/953))
- Support SSR register options including `extensions` ([#939](https://github.com/sveltejs/svelte/issues/939))
- Friendlier error for illegal contexts ([#934](https://github.com/sveltejs/svelte/issues/934))
- Remove whitespace around `<:Window>` components ([#943](https://github.com/sveltejs/svelte/issues/943))

## 1.42.1

- Correctly append items inside a slotted `each` block ([#932](https://github.com/sveltejs/svelte/pull/932))
- Fix `<:Window bind:online/>` ([#936](https://github.com/sveltejs/svelte/issues/936))
- Attach globals to state upon initialisation ([#908](https://github.com/sveltejs/svelte/issues/908))

## 1.42.0

- Implement `indeterminate` binding for checkbox inputs ([#910](https://github.com/sveltejs/svelte/issues/910))
- Use `<option>` children as `value` attribute if none exists ([#928](https://github.com/sveltejs/svelte/issues/928))
- Allow quoted property names in default export and sub-properties ([#914](https://github.com/sveltejs/svelte/issues/914))
- Various improvements to generated code for bindings

## 1.41.4

- Handle self-destructive bindings ([#917](https://github.com/sveltejs/svelte/issues/917))
- Prevent `innerHTML` with `<option>` elements ([#915](https://github.com/sveltejs/svelte/issues/915))
- Use `dataset` unless `legacy` is true ([#858](https://github.com/sveltejs/svelte/issues/858))
- Add `prepare` script to facilitate installing from git ([#923](https://github.com/sveltejs/svelte/pull/923))

## 1.41.3

- Prevent argument name clashes ([#911](https://github.com/sveltejs/svelte/issues/911))
- Fix UMD factory arguments ([#918](https://github.com/sveltejs/svelte/pull/918))
- Don't attempt to set computed values ([#893](https://github.com/sveltejs/svelte/issues/893))
- Fix TypeScript build error ([#919](https://github.com/sveltejs/svelte/issues/919))

## 1.41.2

- Handle attribute selectors with no value ([#905](https://github.com/sveltejs/svelte/issues/905))
- Retain `async` keyword when extracting functions ([#904](https://github.com/sveltejs/svelte/issues/904))
- Shallow clone `data` on initialisation ([#891](https://github.com/sveltejs/svelte/pull/891))

## 1.41.1

- Fix updates of destructured each blocks ([#897](https://github.com/sveltejs/svelte/pull/897))
- Don't warn on `options.*` event handler callee ([#900](https://github.com/sveltejs/svelte/pull/900))

## 1.41.0

- `onwarn` and `onerror` receive default handlers as second arguments ([#883](https://github.com/sveltejs/svelte/pull/883))
- Recognise `muted` as boolean property on `<audio>` elements ([#886](https://github.com/sveltejs/svelte/pull/886))
- Array destructuring for `each` block contexts ([#889](https://github.com/sveltejs/svelte/pull/889))

## 1.40.2

- Ignore `@apply` and similar in CSS ([#871](https://github.com/sveltejs/svelte/issues/871))
- Properly escape CSS in custom elements ([#872](https://github.com/sveltejs/svelte/issues/872))

## 1.40.1

- Always use explicit closing tags with `innerHTML` ([#866](https://github.com/sveltejs/svelte/issues/866))
- Escape text in `textContent` and `innerHTML` expressions ([#868](https://github.com/sveltejs/svelte/issues/868))

## 1.40.0

- Short fragment method names ([#863](https://github.com/sveltejs/svelte/pull/863))
- Extract declarations out of default export ([#756](https://github.com/sveltejs/svelte/issues/756))

## 1.39.4

- Extract shared init logic ([#855](https://github.com/sveltejs/svelte/pull/855))
- Allow `console.*` calls in event handlers ([#782](https://github.com/sveltejs/svelte/issues/782))
- Marker comments in output ([#823](https://github.com/sveltejs/svelte/issues/823))
- Use `textContent` and `innerHTML` where appropriate ([#23](https://github.com/sveltejs/svelte/issues/23))
- Various improvements to generated code

## 1.39.3

- Allow `slot='...'` inside custom elements ([#827](https://github.com/sveltejs/svelte/issues/827))
- Disallow `slot='...'` inside if/each blocks ([#849](https://github.com/sveltejs/svelte/issues/849))
- Use correct parent node for slotted if blocks ([#850](https://github.com/sveltejs/svelte/issues/850))

## 1.39.2

- Escape CSS in shadow DOM ([#840](https://github.com/sveltejs/svelte/issues/840))
- Fix missing anchor bug inside SVG elements ([#843](https://github.com/sveltejs/svelte/issues/843))

## 1.39.1

- Always use anchors for slotted content ([#822](https://github.com/sveltejs/svelte/issues/822))
- Prevent ES6 in helpers ([#838](https://github.com/sveltejs/svelte/issues/838))
- Correctly determine whether to use `timeRangesToArray` ([#837](https://github.com/sveltejs/svelte/pull/837))

## 1.39.0

- Always attach fragment to shadow root ([#821](https://github.com/sveltejs/svelte/issues/821))
- Add `buffered`, `seekable`, `played` bindings to media elements ([#819](https://github.com/sveltejs/svelte/pull/819))
- Quote `class` properties in legacy mode ([#830](https://github.com/sveltejs/svelte/issues/830))
- Warn on missing `lang` attribute on `<html>` ([#828](https://github.com/sveltejs/svelte/pull/828))

## 1.38.0

- Compile-time a11y warnings ([#815](https://github.com/sveltejs/svelte/pull/815))
- Remove redundant input blowback guards ([#645](https://github.com/sveltejs/svelte/issues/645))
- Use component name in debugging messages ([#781](https://github.com/sveltejs/svelte/issues/781))

## 1.37.0

- Experimental support for compiling to custom elements ([#797](https://github.com/sveltejs/svelte/issues/797))

## 1.36.0

- Optimize `style` attributes where possible ([#455](https://github.com/sveltejs/svelte/issues/455))

## 1.35.0

- `set` and `get` continue to work until `destroy` is complete ([#788](https://github.com/sveltejs/svelte/issues/788))
- Observers of unchanged bound values don't fire incorrectly ([#804](https://github.com/sveltejs/svelte/issues/804))
- Nested components with slotted content render correctly in SSR mode ([#801](https://github.com/sveltejs/svelte/issues/801))
- More efficient rendering of raw and slotted content ([#637](https://github.com/sveltejs/svelte/issues/637))
- Handle unquoted attributes in attribute selectors ([#798](https://github.com/sveltejs/svelte/issues/798))

## 1.34.0

- Support nested `<slot>` elements ([#790](https://github.com/sveltejs/svelte/issues/790))
- Attach `options` to instance ([#550](https://github.com/sveltejs/svelte/issues/550), [#777](https://github.com/sveltejs/svelte/issues/777))
- Error if transitions are applied to component ([#791](https://github.com/sveltejs/svelte/issues/791))
- Handle CSS variables in `<style>` tag ([#757](https://github.com/sveltejs/svelte/issues/757))

## 1.33.0

- Replace `{{yield}}` with `<slot>` — adds fallback content named slots, and `options.slots` ([#763](https://github.com/sveltejs/svelte/issues/763))

## 1.32.0

- Allow `anchor` initialisation option, alongside `target` ([#784](https://github.com/sveltejs/svelte/issues/784))
- Remove leading CSS selectors safely ([#783](https://github.com/sveltejs/svelte/issues/783))

## 1.31.0

- Add `legacy` compile option, which adds IE9 compatibility ([#773](https://github.com/sveltejs/svelte/issues/773))

## 1.30.0

- Update all component bindings simultaneously ([#760](https://github.com/sveltejs/svelte/issues/760))
- Fix `@keyframes` atrules with `from` and `to` selectors ([#774](https://github.com/sveltejs/svelte/issues/774))

## 1.29.3

- Only recompute tag and attribute values if they could have changed ([#768](https://github.com/sveltejs/svelte/issues/768))
- Fix CSS scoping with multiple levels of descendant selectors ([#767](https://github.com/sveltejs/svelte/issues/767))

## 1.29.2

- Preserve space before non-parenthesized media query expression ([#759](https://github.com/sveltejs/svelte/issues/759))
- Call `create()` on new iterations of static each blocks ([#762](https://github.com/sveltejs/svelte/issues/762))
- Use `change` events as well as `input` events to bind range inputs ([#740](https://github.com/sveltejs/svelte/issues/740))

## 1.29.1

- Replace `set` and `destroy` with `noop` when component is destroyed ([#744](https://github.com/sveltejs/svelte/issues/744))

## 1.29.0

- Add static `setup` method ([#578](https://github.com/sveltejs/svelte/issues/578))
- Hoist if block selectors ([#751](https://github.com/sveltejs/svelte/pull/751))
- More sigil escaping fixes ([#750](https://github.com/sveltejs/svelte/pull/750))

## 1.28.1

- Fix unescaping of special words in SSR mode ([#741](https://github.com/sveltejs/svelte/issues/741))

## 1.28.0

- Support `ref:foo` as a CSS selector ([#693](https://github.com/sveltejs/svelte/issues/693))
- Prevent magic-string bugs by only minifying CSS combinators if `cascade: false` ([#743](https://github.com/sveltejs/svelte/issues/743))
- Don't throw an error if component is destroyed twice ([#643](https://github.com/sveltejs/svelte/issues/643))

## 1.27.0

- Minify CSS and remove unused styles ([#697](https://github.com/sveltejs/svelte/issues/697))
- Optimize ternary expressions when excluding unused CSS ([#696](https://github.com/sveltejs/svelte/issues/696))
- Clear refs after `ondestroy` callbacks fire ([#706](https://github.com/sveltejs/svelte/issues/706))
- Prevent certain forms of component binding blowback ([#721](https://github.com/sveltejs/svelte/issues/721))
- Use helper to encapsulate styles ([#375](https://github.com/sveltejs/svelte/issues/375))
- Event propagation shorthand — `on:foo` equals `on:foo='fire("foo", event)` ([#638](https://github.com/sveltejs/svelte/issues/638))
- Allow `refs.*` in event handlers, and validate them ([#686](https://github.com/sveltejs/svelte/issues/686))

## 1.26.2

- Unescape `#` characters ([#722](https://github.com/sveltejs/svelte/issues/722))

## 1.26.1

- Fix select binding regression ([#724](https://github.com/sveltejs/svelte/issues/724))

## 1.26.0

- Enforce correct order of operations when initialising ([#708](https://github.com/sveltejs/svelte/issues/708) and [#714](https://github.com/sveltejs/svelte/issues/714))
- Ensure data is up-to-date when re-rendering yield block ([#711](https://github.com/sveltejs/svelte/issues/711))
- Fix unescaping of strings, preserve at-rules in CSS ([#712](https://github.com/sveltejs/svelte/issues/712))
- Preserve whitespace at end of each blocks ([#713](https://github.com/sveltejs/svelte/issues/713))

## 1.25.1

- Better CSS sourcemaps ([#716](https://github.com/sveltejs/svelte/pull/716))

## 1.25.0

- Fix hoisted event handlers ([#699](https://github.com/sveltejs/svelte/issues/699))
- Fire `intro.start` and `outro.start` events ([#702](https://github.com/sveltejs/svelte/issues/702))
- Preserve order of components in keyed each blocks ([#700](https://github.com/sveltejs/svelte/issues/700))
- Add `cssMap` property to compiler output ([#698](https://github.com/sveltejs/svelte/pull/698/))

## 1.24.0

- Deconflict names with imports in SSR compiler ([#655](https://github.com/sveltejs/svelte/issues/655))
- Improved transition performance ([#670](https://github.com/sveltejs/svelte/pull/670))
- Run transitions on initial render ([#651](https://github.com/sveltejs/svelte/issues/651))
- Add dev mode warning if `hydrate` is true but `hydratable` was false ([#664](https://github.com/sveltejs/svelte/issues/664))
- Manipulate sourcemap to make missing loop values obvious ([#683](https://github.com/sveltejs/svelte/pull/683))
- Only add CSS scoping attributes where necessary ([#679](https://github.com/sveltejs/svelte/issues/679))
- Warn on unused CSS selectors ([#678](https://github.com/sveltejs/svelte/issues/678))
- Fix `<select>` binding in loop ([#685](https://github.com/sveltejs/svelte/issues/685))
- Prevent bindings from calling `oncreate` functions prematurely ([#694](https://github.com/sveltejs/svelte/pull/694))
- Simpler codegen ([#673](https://github.com/sveltejs/svelte/pull/673))

## 1.23.4

- Don't recreate if blocks incorrectly ([#669](https://github.com/sveltejs/svelte/pull/669))

## 1.23.3

- Pass parameters to `get_block` ([#667](https://github.com/sveltejs/svelte/issues/667))

## 1.23.2

- Fix if blocks being recreated on update ([#665](https://github.com/sveltejs/svelte/issues/665))

## 1.23.1

- Fix each-else blocks that are empty on initial render ([#662](https://github.com/sveltejs/svelte/issues/662))

## 1.23.0

- Hydration ([#649](https://github.com/sveltejs/svelte/pull/649))
- Correctly transform CSS selectors with pseudo-elements ([#658](https://github.com/sveltejs/svelte/issues/658))

## 1.22.5

- Fix nested component unmounting bug ([#643](https://github.com/sveltejs/svelte/issues/643))

## 1.22.4

- Include `ast` in `svelte.compile` return value ([#632](https://github.com/sveltejs/svelte/issues/632))
- Set initial value of `<select>` binding, if unspecified ([#639](https://github.com/sveltejs/svelte/issues/639))
- Mark indirect dependencies of `<select>` bindings (i.e. the dependencies of their `<option>` values) ([#639](https://github.com/sveltejs/svelte/issues/639))

## 1.22.3

- Fix nested component unmounting bug ([#625](https://github.com/sveltejs/svelte/issues/625))
- Allow components to have computed member expression bindings ([#624](https://github.com/sveltejs/svelte/issues/624))
- Handle empty `<style>` tags ([#634](https://github.com/sveltejs/svelte/issues/634))
- Warn on missing component ([#623](https://github.com/sveltejs/svelte/issues/623))
- Allow dynamic `type` attribute for unbound inputs ([#620](https://github.com/sveltejs/svelte/issues/620))
- Rename `addEventListener` and `removeEventListener` directives ([#621](https://github.com/sveltejs/svelte/issues/621))

## 1.22.2

- Escape template strings correctly in SSR output ([#616](https://github.com/sveltejs/svelte/issues/616))
- Prevent magic-string deprecation warning ([#617](https://github.com/sveltejs/svelte/pull/617))

## 1.22.1

- Sanitise event handler names ([#612](https://github.com/sveltejs/svelte/issues/612))

## 1.22.0

- Symmetry between `mount` and `unmount`. This is potentially a breaking change if your components import other components that were precompiled with an earlier version of Svelte ([#592](https://github.com/sveltejs/svelte/issues/592))
- Add `cascade` option, which prevents styles affecting child components if `false`, unless selectors are wrapped in `:global(...)` and keyframe declaration IDs are prefixed with `-global-`. This will become the default behaviour in v2 ([#583](https://github.com/sveltejs/svelte/issues/583))
- Support binding to computed member expressions ([#602](https://github.com/sveltejs/svelte/issues/602))
- Coerce empty string in `number`/`range` inputs to `undefined`, not `0` ([#584](https://github.com/sveltejs/svelte/issues/584))
- Fix insert location of DOM elements in each/if/nested component edge cases ([#610](https://github.com/sveltejs/svelte/issues/610))

## 1.21.0

- Always use `helpers` if referenced, not just for call expressions ([#575](https://github.com/sveltejs/svelte/issues/575))
- Fix parsing of `<textarea>` children ([#599](https://github.com/sveltejs/svelte/pull/599))
- Treat `<textarea>` value attributes and children as equivalent, and fail validation if both are present ([#599](https://github.com/sveltejs/svelte/pull/599))
- Fix `<textarea>` SSR ([#599](https://github.com/sveltejs/svelte/pull/599))
- Apply CSS transition styles immediately if transition has delay ([#574](https://github.com/sveltejs/svelte/issues/574))
- Ensure `transitionManager` is treeshakeable ([#593](https://github.com/sveltejs/svelte/issues/593))
- Fix for environments where `node.style.animation` is undefined ([#587](https://github.com/sveltejs/svelte/issues/587))
- Fix order of operations when dealing with `<select>` elements ([#590](https://github.com/sveltejs/svelte/issues/590))
- Downgrade 'invalid callee' to a warning ([#579](https://github.com/sveltejs/svelte/issues/579))
- Convert to TypeScript ([#573](https://github.com/sveltejs/svelte/pull/573))

## 1.20.2

- Fix destruction of compound if-blocks with outros ([#572](https://github.com/sveltejs/svelte/pull/572))

## 1.20.1

- Fix insertion order of `if` blocks and their anchors ([#569](https://github.com/sveltejs/svelte/issues/569))

## 1.20.0

- Faster, better updates of keyed each blocks ([#373](https://github.com/sveltejs/svelte/issues/373), [#543](https://github.com/sveltejs/svelte/issues/543))
- Use element IDs to robustly track dynamically injected `<style>` tags ([#554](https://github.com/sveltejs/svelte/issues/554))
- Abort outros before corresponding intros ([#546](https://github.com/sveltejs/svelte/issues/546))
- Generate less code for `if` blocks with `else` blocks ([#540](https://github.com/sveltejs/svelte/issues/540))
- Ensure `{{yield}}` block content is injected into the right place ([#561](https://github.com/sveltejs/svelte/issues/561))
- Simpler, more readable codegen code ([#559](https://github.com/sveltejs/svelte/pull/559))
- Validate transition directives ([#564](https://github.com/sveltejs/svelte/issues/564))
- Apply delays to bidirectional transitions ([#562](https://github.com/sveltejs/svelte/issues/562))
- Handle all valid HTML entities ([#565](https://github.com/sveltejs/svelte/pull/565))
- Fix outros on compound `if` blocks ([#565](https://github.com/sveltejs/svelte/pull/565))
- Validation for `<:Window>` tags ([#565](https://github.com/sveltejs/svelte/pull/565))
- Increased test coverage ([#565](https://github.com/sveltejs/svelte/pull/565))

## 1.19.1

- Export `generateKeyframes`, so that CSS transitions work

## 1.19.0

- Experimental support for transitions ([#7](https://github.com/sveltejs/svelte/issues/7))
- Use `querySelector(':checked')` instead of `selectedOptions` ([#539](https://github.com/sveltejs/svelte/issues/539))
- Stringify helpers before bundling them, to avoid renaming errors ([#538](https://github.com/sveltejs/svelte/issues/538))

## 1.18.2

- Parenthesize if-block conditions ([#532](https://github.com/sveltejs/svelte/issues/532))
- Fix parsing of parenthesized expressions ([#534](https://github.com/sveltejs/svelte/issues/534))
- Fix error on `bind:checked` that doesn't belong to a checkbox input ([#529](https://github.com/sveltejs/svelte/pull/529))

## 1.18.1

- Allow `destroy()` in event handlers ([#523](https://github.com/sveltejs/svelte/issues/523))
- Fix bug with `{{yield}}` blocks following elements ([#524](https://github.com/sveltejs/svelte/issues/524))

## 1.18.0

- Visit `<select>` attributes after children, to ensure options are in the right state ([#521](https://github.com/sveltejs/svelte/pull/521))
- Use sibling elements as anchors rather than creating comment nodes wherever possible ([#3](https://github.com/sveltejs/svelte/issues/3))

## 1.17.2

- Replace bad characters when creating variable names based on element names ([#516](https://github.com/sveltejs/svelte/issues/516))

## 1.17.1

- Fixes for static each-else and yield blocks ([#509](https://github.com/sveltejs/svelte/issues/509)), ([#514](https://github.com/sveltejs/svelte/issues/514))
- Code generation tweaks ([#504](https://github.com/sveltejs/svelte/issues/504)), ([#507](https://github.com/sveltejs/svelte/issues/507))

## 1.17.0

- Add `currentTime`, `duration` and `paused` bindings for media elements ([#406](https://github.com/sveltejs/svelte/issues/406))
- Don't treat helpers as dependencies ([#492](https://github.com/sveltejs/svelte/issues/492))
- Allow `<:Window>` event handlers to access component state ([#497](https://github.com/sveltejs/svelte/pull/497))
- Allow two-way binding to properties named 'component' ([#495](https://github.com/sveltejs/svelte/issues/495))
- Group checkbox bindings correctly, to avoid erroneously unchecking siblings ([#498](https://github.com/sveltejs/svelte/issues/498))
- Validate two-way bindings ([#494](https://github.com/sveltejs/svelte/pull/494))
- Allow dynamic each-block to have static else-block ([#501](https://github.com/sveltejs/svelte/pull/501))
- Initialise `<select>` value correctly ([#502](https://github.com/sveltejs/svelte/pull/502))

## 1.16.0

- Better code generation ([#489](https://github.com/sveltejs/svelte/pull/489)), ([#490](https://github.com/sveltejs/svelte/pull/490)), ([#491](https://github.com/sveltejs/svelte/pull/491))
- Prevent binding blowback on initial render ([#488](https://github.com/sveltejs/svelte/pull/488))

## 1.15.1

- Clone data before merging it with state ([#479](https://github.com/sveltejs/svelte/issues/479))
- Apply binding event handlers before user event handlers ([#486](https://github.com/sveltejs/svelte/issues/486))

## 1.15.0

- Dev mode — downgrade 'missing data' to a warning, and ignore whitelisted globals ([#475](https://github.com/sveltejs/svelte/issues/475))
- Fix `<select>` value binding when options are updated late ([#476](https://github.com/sveltejs/svelte/issues/476))
- Throw at compile time if event handler references invalid callee ([#473](https://github.com/sveltejs/svelte/pull/473))
- Check for helper function purity ([#473](https://github.com/sveltejs/svelte/pull/473))
- Validate `namespace` option ([#473](https://github.com/sveltejs/svelte/pull/473))

## 1.14.1

- Replace bad characters when creating variable names based on attributes ([#470](https://github.com/sveltejs/svelte/issues/470))

## 1.14.0

- Better guard against naming conflicts ([#465](https://github.com/sveltejs/svelte/issues/465))
- Better error if getters and setters are used with `methods` ([#425](https://github.com/sveltejs/svelte/issues/425))
- Don't create whitespace nodes inside elements that can't use them ([#189](https://github.com/sveltejs/svelte/issues/189))
- Collapse consecutive `if` statements with the same condition ([#450](https://github.com/sveltejs/svelte/issues/450))
- Window `scroll` bindings are bidirectional ([#404](https://github.com/sveltejs/svelte/issues/404))
- Add `bind:online` to window ([#404](https://github.com/sveltejs/svelte/issues/404))
- In dev mode, throw if read-only properties are set ([#404](https://github.com/sveltejs/svelte/issues/404))
- Prevent conflicts with component name ([#464](https://github.com/sveltejs/svelte/pull/464))
- Ensure event handler names are deconflicted ([#466](https://github.com/sveltejs/svelte/issues/466))

## 1.13.7

- Fix observers — `defer: true` now triggers callback after DOM is updated ([#441](https://github.com/sveltejs/svelte/issues/441))
- Handle empty `computed` property ([#452](https://github.com/sveltejs/svelte/issues/452))
- Correctly bind one-way `<select>` value attributes with objects ([#423](https://github.com/sveltejs/svelte/issues/423))
- Hoist event handlers inside each blocks, where possible ([#456](https://github.com/sveltejs/svelte/pull/456))
- Don't bind event handler callbacks ([#433](https://github.com/sveltejs/svelte/issues/433))
- Internal refactoring and neater code generation ([#453](https://github.com/sveltejs/svelte/pull/453))

## 1.13.6

- Use `assign` helper instead of `Object.assign` for better performance and legacy compatibility ([#431](https://github.com/sveltejs/svelte/issues/431))
- Improved code generation ([#419](https://github.com/sveltejs/svelte/issues/419)), ([#440](https://github.com/sveltejs/svelte/issues/440)), ([#442](https://github.com/sveltejs/svelte/issues/442))

## 1.13.5

- Read `range` and `number` input values as numbers ([#436](https://github.com/sveltejs/svelte/issues/436))
- Better error for `bind:value='{{foo}}'` ([#437](https://github.com/sveltejs/svelte/issues/437))

## 1.13.4

- Prevent unclosed `<script>` tag causing infinite loop ([#435](https://github.com/sveltejs/svelte/pull/435))

## 1.13.3

- Correctly handle `{{true}}`, `{{false}}` and `{{null}}` ([#424](https://github.com/sveltejs/svelte/issues/424))
- Update `<select>` value attributes correctly ([#423](https://github.com/sveltejs/svelte/issues/423))
- Bind custom event handler callbacks ([#428](https://github.com/sveltejs/svelte/issues/428))
- Disallow `import root` ([#430](https://github.com/sveltejs/svelte/pull/430))
- Prevent component bindings mutating the wrong object ([#432](https://github.com/sveltejs/svelte/pull/432))

## 1.13.2

- Fix deep component bindings ([#420](https://github.com/sveltejs/svelte/issues/420))
- Include `css` property in compiler output ([#409](https://github.com/sveltejs/svelte/issues/409))
- Treat functions as mutable objects when recomputing ([#413](https://github.com/sveltejs/svelte/issues/413)
- Include magic-string in bundle ([#410](https://github.com/sveltejs/svelte/issues/410))
- Disable unneeded Bublé transformations for slimmer output ([#411](https://github.com/sveltejs/svelte/pull/411))

## 1.13.1

- Prevent infinite loops with pathological component bindings ([#398](https://github.com/sveltejs/svelte/issues/398))
- More robust deconflicting ([#401](https://github.com/sveltejs/svelte/pull/401))

## 1.13.0

- Add `<:Window>` meta tag with event listeners, and a handful of bindings ([#371](https://github.com/sveltejs/svelte/issues/371))
- Don't uncheck radios incorrectly ([#399](https://github.com/sveltejs/svelte/issues/399))

## 1.12.1

- Deconflict non-helper functions (`addCss` etc) ([#388](https://github.com/sveltejs/svelte/issues/388))
- Allow reserved words in tags, e.g. `{{class}}` ([#383](https://github.com/sveltejs/svelte/issues/383))

## 1.12.0

- Shorthand attributes — `<Widget :foo/>` is equivalent to `<Widget foo='{{foo}}'/>` ([#384](https://github.com/sveltejs/svelte/pull/384))
- Support `bind:group` for radio and checkbox inputs ([#311](https://github.com/sveltejs/svelte/issues/311), [#312](https://github.com/sveltejs/svelte/issues/312))
- Better sourcemap support for two-way bindings

## 1.11.4

- Dev mode warning for bad `component.observe` arguments ([#369](https://github.com/sveltejs/svelte/issues/369))
- Translate `component.on('teardown', ...)` to `component.on('destroy', ...)` and add dev warning ([#365](https://github.com/sveltejs/svelte/issues/365))
- Use shared prototype to save bytes ([#378](https://github.com/sveltejs/svelte/pull/378))

## 1.11.3

- Undo CSS behaviour change in 1.11.2 ([#372](https://github.com/sveltejs/svelte/issues/372))
- Pin version of css-tree ([#370](https://github.com/sveltejs/svelte/pull/370))

## 1.11.2

- Add component CSS to each document a component is rendered to ([#331](https://github.com/sveltejs/svelte/issues/331))

## 1.11.1

- Fix two-way binding for components inside `each` blocks ([#356](https://github.com/sveltejs/svelte/issues/356))

## 1.11.0

- Add `format: 'eval'` and `svelte.create`, to create components directly from source code ([#345](https://github.com/sveltejs/svelte/issues/345))
- Node 4 compatibility ([#109](https://github.com/sveltejs/svelte/issues/109))

## 1.10.3

- Prevent `'</script>'` string occurrence breaking pages ([#349](https://github.com/sveltejs/svelte/pull/349))
- Allow reference to whitelisted globals without properties ([#333](https://github.com/sveltejs/svelte/pull/333))
- Don't remove `&nbsp;` incorrectly ([#348](https://github.com/sveltejs/svelte/issues/348))
- `let` -> `var` in `addCss` block ([#351](https://github.com/sveltejs/svelte/pull/351))

## 1.10.2

- Accept any case for doctype declarations ([#336](https://github.com/sveltejs/svelte/issues/336))
- Allow non-top-level `<script>` and `<style>` tags to pass through without processing ([#335](https://github.com/sveltejs/svelte/issues/335))

## 1.10.1

- typecheck argument in \_set when in dev mode ([#342](https://github.com/sveltejs/svelte/issues/342))
- Prevent duplicate helpers in non-shared mode ([#337](https://github.com/sveltejs/svelte/issues/337))

## 1.10.0

- Component self-references with `<:Self/>` ([#51](https://github.com/sveltejs/svelte/issues/51))
- Two-way binding with `<select multiple>` ([#313](https://github.com/sveltejs/svelte/issues/313))

## 1.9.1

- Better error for malformed event handlers ([#220](https://github.com/sveltejs/svelte/issues/220))
- Allow function expressions in tags ([#269](https://github.com/sveltejs/svelte/issues/269))

## 1.9.0

- Add development warnings ([#13](https://github.com/sveltejs/svelte/issues/13)), ([#320](https://github.com/sveltejs/svelte/pull/320)), ([#177](https://github.com/sveltejs/svelte/issues/177)), ([#249](https://github.com/sveltejs/svelte/issues/249))
- Better error if parser encounters an unmatched closing tag ([#321](https://github.com/sveltejs/svelte/issues/321))

## 1.8.1

- Allow implicitly closed elements ([#318](https://github.com/sveltejs/svelte/pull/318))
- More informative error messages for unclosed elements/blocks ([#258](https://github.com/sveltejs/svelte/issues/258))
- Deprecate `onrender` and `onteardown` in favour of `oncreate` and `ondestroy` ([#40](https://github.com/sveltejs/svelte/issues/40))

## 1.8.0

- Prevent duplicate imports ([#308](https://github.com/sveltejs/svelte/issues/308))
- Use `input` events (not `change`) for all input elements other than `checkbox` and `radio`, and textareas ([#309](https://github.com/sveltejs/svelte/pull/309))
- Encapsulate keyframe declarations ([#245](https://github.com/sveltejs/svelte/issues/245))

## 1.7.1

- Deconflict imports and shared helpers ([#222](https://github.com/sveltejs/svelte/issues/222))
- Deconflict each-block contexts and reserved words ([#222](https://github.com/sveltejs/svelte/issues/222))
- Allow shorthand properties in expressions ([#296](https://github.com/sveltejs/svelte/issues/296))

## 1.7.0

- Include CSS AST in `svelte.parse` output ([#302](https://github.com/sveltejs/svelte/pull/302))
- Better handling of CSS parse errors ([#302](https://github.com/sveltejs/svelte/pull/302))
- Initialise `<select>` elements with two-way binding correctly ([#301](https://github.com/sveltejs/svelte/issues/301))
- Allow local context in component event handlers inside `each` blocks ([#290](https://github.com/sveltejs/svelte/issues/290))
- Fix two-way binding for components inside `each` blocks ([#290](https://github.com/sveltejs/svelte/issues/290))

## 1.6.11

- Initialise dynamic `<option>` value correctly ([#291](https://github.com/sveltejs/svelte/issues/291))

## 1.6.10

- Ensure `sources` and `sourcesContent` are populated in sourcemaps, even if none of the original code is used ([#295](https://github.com/sveltejs/svelte/pull/295))
- Add `outputFilename` option to populate `file` and `sources` sourcemap properties correctly ([#295](https://github.com/sveltejs/svelte/pull/295))

## 1.6.9

- Don't trigger bindings for torn-down components ([#277](https://github.com/sveltejs/svelte/issues/277))
- SSR: Handle two-way bindings ([#275](https://github.com/sveltejs/svelte/issues/275))
- Improve performance by checking data has changed before updates ([#279](https://github.com/sveltejs/svelte/pull/279))
- Parse CSS with css-tree to prevent transformation errors with unconventional styles ([#288](https://github.com/sveltejs/svelte/issues/288))

## 1.6.8

- Always trigger `onrender`, including when change initiator is a nested component ([#263](https://github.com/sveltejs/svelte/issues/263))
- Handle default function parameters in computations ([#274](https://github.com/sveltejs/svelte/issues/274))

## 1.6.7

- SSR: Fix apostrophes ([#267](https://github.com/sveltejs/svelte/issues/267))
- Add `xmlns` attributes to SVGs ([#262](https://github.com/sveltejs/svelte/pull/262))

## 1.6.6

- Omit text from comment anchors ([#247](https://github.com/sveltejs/svelte/issues/247))
- Handle `xlink` attributes ([#264](https://github.com/sveltejs/svelte/issues/264))

## 1.6.5

- Handle `<!doctype>` declarations ([#255](https://github.com/sveltejs/svelte/pull/255))

## 1.6.4

- Fix updates of yields inside each blocks ([20e1b05](https://github.com/sveltejs/svelte/commit/20e1b05c45dc9fcddfe2e7c5c9fc3109f0d45fa9))
- SSR: Handle attributes with values that begin with a number ([#248](https://github.com/sveltejs/svelte/issues/248))
- Handle multiline comments in CSS ([#252](https://github.com/sveltejs/svelte/issues/252))

## 1.6.3

- Fix `{{yield}}` bugs for components inside `if` and `each` blocks ([#230](https://github.com/sveltejs/svelte/issues/230), [#231](https://github.com/sveltejs/svelte/issues/231))
- Set attributes on `<svg>` elements correctly ([#233](https://github.com/sveltejs/svelte/issues/233))
- Add `svelte.VERSION` property to compiler

## 1.6.2

- Use helpers for `addEventListener`, `removeEventListener`, `setAttribute` ([#227](https://github.com/sveltejs/svelte/pull/227))
- Escape `sharedPath` ([#229](https://github.com/sveltejs/svelte/pull/229))
- Handle attributes with values that begin with a number ([#234](https://github.com/sveltejs/svelte/issues/234))
- Update dependencies

## 1.6.1

- SSR: Handle component directives at arbitrary positions ([#221](https://github.com/sveltejs/svelte/issues/221))
- Provide useful feedback on invalid void closing tag ([#224](https://github.com/sveltejs/svelte/issues/224))

## 1.6.0

- Replace `standalone: false` with `shared: true`, or `shared: 'custom/path/to/shared.js'` ([#218](https://github.com/sveltejs/svelte/issues/218))
- Include `shared.js` in package

## 1.5.0

- Implement `standalone: false` ([#9](https://github.com/sveltejs/svelte/issues/9))
- SSR: Handle component directives ([216](https://github.com/sveltejs/svelte/issues/216))

## 1.4.0

- Keyed `each` blocks ([#81](https://github.com/sveltejs/svelte/issues/81))

## 1.3.1

- Remove file extensions from AMD dependencies ([#144](https://github.com/sveltejs/svelte/issues/144))
- Throw if `options.name` is illegal ([#102](https://github.com/sveltejs/svelte/issues/102))

## 1.3.0

- SSR compiler: Support `format` option ([#196](https://github.com/sveltejs/svelte/issues/196))
- SSR compiler: Don't self-close 'normal' elements ([#200](https://github.com/sveltejs/svelte/issues/200))
- Remove leading spaces from scoped CSS ([#140](https://github.com/sveltejs/svelte/issues/140))
- Internal refactoring

## 1.2.5

- Allow whitelisted globals in templates ([#185](https://github.com/sveltejs/svelte/issues/185))
- Intercept parse errors with `options.onerror`

## 1.2.4

- SSR compiler: Implement `{{{triples}}}` ([#197](https://github.com/sveltejs/svelte/issues/197))
- SSR compiler: Escape HTML in tags ([#197](https://github.com/sveltejs/svelte/issues/197))

## 1.2.3

- Add support for `namespace` declaration for SVG (etc) components ([#147](https://github.com/sveltejs/svelte/issues/147))
- Throw error if methods or lifecycle hooks are arrow functions that use `this` or `arguments` ([#179](https://github.com/sveltejs/svelte/issues/179))
- Use `setAttribute()` for `list` attributes, to preserve link to `<datalist>` ([#178](https://github.com/sveltejs/svelte/issues/178))
- Throw error if default export is not an object literal ([#190](https://github.com/sveltejs/svelte/pull/190))
- Internal refactoring

## 1.2.2

- Omit directives in server-side rendering ([#163](https://github.com/sveltejs/svelte/issues/167))
- Handle comments in SSR ([#165](https://github.com/sveltejs/svelte/issues/165))
- Support calling methods of `event`/`this` in event handlers ([#162](https://github.com/sveltejs/svelte/issues/162))
- Remove `mount` from public API ([#150](https://github.com/sveltejs/svelte/issues/150))

## 1.2.1

- Server-side rendering is available as a compiler option (`generate: 'ssr'`) ([#159](https://github.com/sveltejs/svelte/pull/159))
- Allow call expressions where function is not in `helpers` ([#163](https://github.com/sveltejs/svelte/issues/163))

## 1.2.0

- Server-side rendering of HTML ([#148](https://github.com/sveltejs/svelte/pull/148)) and CSS ([#154](https://github.com/sveltejs/svelte/pull/154))

## 1.1.3

- Handle `xmlns` attributes correctly ([#142](https://github.com/sveltejs/svelte/issues/142))
- Error on duplicate `<style>`/`<script>` tags rather than failing silently ([#142](https://github.com/sveltejs/svelte/issues/142))
- Don't create whitespace text nodes inside SVG elements ([#142](https://github.com/sveltejs/svelte/issues/142))
- Require void elements to be lowercase, to eliminate confusion with components ([#137](https://github.com/sveltejs/svelte/issues/137))

## 1.1.2

- Deconflict variable names ([#88](https://github.com/sveltejs/svelte/issues/88), [#126](https://github.com/sveltejs/svelte/issues/126))

## 1.1.1

- Support multiple SVG elements in a component ([#130](https://github.com/sveltejs/svelte/issues/130))

## 1.1.0

- Separate fragment creation from `mount` ([#91](https://github.com/sveltejs/svelte/pull/91))
- Trigger `onrender` hook at correct time for nested components ([#103](https://github.com/sveltejs/svelte/pull/103))
- Fix keypath dynamic attributes in components ([#46](https://github.com/sveltejs/svelte/issues/46))
- Implement `{{yield}}` ([#112](https://github.com/sveltejs/svelte/pull/112))
- Optimise teardown ([#99](https://github.com/sveltejs/svelte/issues/99))
- Require computed properties to have at least one dependency ([#115](https://github.com/sveltejs/svelte/pull/115))
- Support `{{#each ...}}...{{else}}...{{/each}}` ([#90](https://github.com/sveltejs/svelte/issues/90))
- Triple mustaches ([#35](https://github.com/sveltejs/svelte/issues/35))

## 1.0.7

- Correctly escape HTML entities ([#85](https://github.com/sveltejs/svelte/issues/85))

## 1.0.6

- Generate useful sourcemaps ([#60](https://github.com/sveltejs/svelte/issues/60))

## 1.0.5

- Ensure compiler only generates ES5 code ([#75](https://github.com/sveltejs/svelte/issues/75))
- `get()` without arguments returns entire state object ([#73](https://github.com/sveltejs/svelte/issues/73))

## 1.0.4

- Handle empty attributes in elements and components ([#63](https://github.com/sveltejs/svelte/issues/63))
- Detach top-level text nodes inside departing each blocks ([#62](https://github.com/sveltejs/svelte/issues/62))

## 1.0.3

- Better generated code for `if` blocks, especially with `else`/`elseif` chains ([#28](https://github.com/sveltejs/svelte/pull/28))
- Trim unnecessary whitespace from `else`/`elseif` blocks ([#49](https://github.com/sveltejs/svelte/pull/49))
- Handle trailing comments in script tags ([#64](https://github.com/sveltejs/svelte/issues/64))

## 1.0.2

Set `style.cssText` rather than `style` ([#44](https://github.com/sveltejs/svelte/issues/44))

## 1.0.1

- Preserve SVG namespace inside each blocks
- Always use `setAttribute` with SVG elements

## 1.0.0

- Generate AMD, CJS, IIFE and UMD builds
- Correctly insert text nodes before anchors ([#31](https://github.com/sveltejs/svelte/pull/31))

## 0.3.0

- Fix bug where departing element would unset `ref` incorrectly ([#24](https://github.com/sveltejs/svelte/issues/24))
- Basic template validation ([#6](https://github.com/sveltejs/svelte/issues/6))
- Fire `onrender` hooks once component is in DOM ([#18](https://github.com/sveltejs/svelte/issues/18))
- Only detach nodes when necessary to do so ([#26](https://github.com/sveltejs/svelte/issues/26))

## 0.2.2

- On second thoughts, don't transpile build. Was only really for Uglify's benefit, which is daft

## 0.2.1

- Transpile build

## 0.2.0

- Only generate UMD build, for now
- Include dependencies in the build, treat as `devDependencies`
- Faster initial render
- Parent data overrides child defaults
- Remove top-level text nodes on teardown
- Handle `readUntil` errors in parser
- Basic `<select>` binding
- Handle missing data
- Prevent infinite set/observe loops
- Add `bind:foo` shorthand
- `else` and `elseif` blocks
- Hoist imports

## 0.1.1

- Support unquoted attributes
- Handle entities in attributes
- Inline nested components
- `fire` and `on` methods

## 0.1.0

- Breaking change – Svelte compiler now generates constructor functions rather than factories ([#2](https://github.com/sveltejs/svelte/issues/2))
- SVG support

## 0.0.2

- First release capable of building TodoMVC

## 0.0.1

- Just squatting on the package name