# Svelte changelog

## 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 occurence 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