svelte/packages/svelte/CHANGELOG.md

svelte

5.0.0-next.60

Patch Changes

• fix: improve effect over-fire on store subscription init (#10535)

• fix: use init properties when exporting non-state values in prod (#10521)

5.0.0-next.59

Patch Changes

• chore: improve code generation for bind:this in SSR mode (#10524)

• fix: visit expression node in directives (#10527)

5.0.0-next.58

Patch Changes

• breaking: remove createRoot, adjust mount/hydrate APIs, introduce unmount (#10516)

5.0.0-next.57

Patch Changes

• fix: correctly scope CSS selectors with descendant combinators (#10490)

• feat: implement support for :is(...) and :where(...) (#10490)

• chore: treeshake unused store subscriptions in SSR mode (#10506)

• fix: warn against accidental global event referenced (#10442)

• fix: improve bind:this support for each blocks (#10510)

• feat: implement nested CSS support (#10490)

• breaking: encapsulate/remove selectors inside :is(...) and :where(...) (#10490)

5.0.0-next.56

Patch Changes

• feat: add hydrate method, make hydration treeshakeable (#10497)

• fix: makes keyed each blocks consistent between dev and prod (#10500)

• fix: subscribe to stores in transition,animation,use directives (#10481)

5.0.0-next.55

Patch Changes

• feat: derive destructured derived objects values (#10488)

• fix: prevent infinite loop when writing to store using shorthand (#10477)

• fix: add proper source map support (#10459)

5.0.0-next.54

Patch Changes

• breaking: replace $derived.call with $derived.by (#10445)

• fix: improve global transition outro handling (#10474)

5.0.0-next.53

Patch Changes

• fix: only throw bind error when not passing a value (#10090)

• fix: improve global transition handling of effect cleardown (#10469)

• fix: improve handling of object property deletions (#10456)

• fix: ensure inspect fires on prop changes (#10468)

5.0.0-next.52

Patch Changes

• fix: use hybrid scoping strategy for consistent specificity increase (#10443)

• fix: throw validation error when binding to each argument in runes mode (#10441)

• fix: make CSS animation declaration transformation more robust (#10432)

• fix: handle sole empty expression tags (#10433)

5.0.0-next.51

Patch Changes

• fix: align beforeUpdate/afterUpdate behavior better with that in Svelte 4 (#10408)

• fix: disallow exporting props, derived and reassigned state from within components (#10430)

• fix: improve indexed each array reconcilation (#10422)

• fix: add compiler error for each block mutations in runes mode (#10428)

5.0.0-next.50

Patch Changes

• fix: set open binding value in <details> (#10413)

5.0.0-next.49

Patch Changes

• fix: properly analyze group expressions (#10410)

• fix: handle nested script tags (#10416)

• fix: only update lazy properties that have actually changed (#10415)

• fix: correctly determine binding scope of let: directives (#10395)

• fix: run onDestroy callbacks during SSR (#10297)

5.0.0-next.48

Patch Changes

• chore: bump zimmerframe to fix bugs introduced in previous version (#10405)

5.0.0-next.47

Patch Changes

• chore: bump zimmerframe to resolve AST-traversal-related bugs (b63ab91c7b92ecec6e7e939d6d509fc3008cf048)

5.0.0-next.46

Patch Changes

• fix: allow let: directives on slot elements (#10391)

• fix: repair each block length mismatches during hydration (#10398)

5.0.0-next.45

Patch Changes

• fix: correctly determine bind:group members (#10368)

• fix: make inline doc links valid (#10365)

5.0.0-next.44

Patch Changes

• fix: bindings with typescript assertions (#10329)

• fix: only reuse state proxies that belong to the current value (#10343)

5.0.0-next.43

Patch Changes

• fix: insert empty text nodes while hydrating, if necessary (#9729)

• fix: correctly update tweened store initialized with nullish value (#10356)

5.0.0-next.42

Patch Changes

• breaking: snippets can now take multiple arguments, support default parameters. Because of this, the type signature has changed (#9988)

• Use generic T as the return type for $derived.call() (#10349)

• fix: replace TODO errors (#10326)

• fix: add proper typings for $derived.call (6145be5c695a063c70944272a42d9c63fdd71d64)

• fix: improve handling of unowned derived signals (#10342)

• fix: correctly reference destructured derived binding in event handler (#10333)

• fix: add scrollend event type (#10337)

• fix: improve unstate handling of non enumerable properties (#10348)

5.0.0-next.41

Patch Changes

• fix: handle event delegation correctly when having sibling event listeners (#10307)

• chore: add $derived.call rune (#10240)

5.0.0-next.40

Patch Changes

• chore: cleanup derived destruction (#10303)

• fix: correctly parse at-rules containing special characters in strings (#10221)

• fix: Add missing miter-clip and arcs values to stroke-linejoin attribute (#10141)

5.0.0-next.39

Patch Changes

• fix: handle deep assignments to $state() class properties correctly (#10289)

• fix: prevent false positive store error in module script (#10291)

• fix: allow type selector in :global() when it's at a start of a compound selector (#10287)

5.0.0-next.38

Patch Changes

• chore: improve should_proxy_or_freeze logic internally (#10249)

• fix: add back derived type overload (776ac3c1762da5f8147c457a997a417cfae67e4c)

• fix: more robust url equality check at dev time (14d7b26897cbfa129847c446b0ecf9557d77ef7c)

• fix: correct increment/decrement code generation (2861ad66e054d2b14f382aaada4512e3e5d56db8)

• fix: sanitize component event names (#10235)

• fix: don't hoist function when already referenced in module scope (1538264bd5ed431d3048d54efe9c83c4db7fb42a)

• fix: try-catch deep read during $inspect (#10270)

• fix: allow ts casts in bindings (#10181)

• fix: allow :global(..) in compound selectors (#10266)

• fix: hydrate controlled each blocks correctly (#10259)

• chore: improve $state static reference warning heuristics (#10275)

• fix: correctly cleanup unowned derived dependency memory (#10280)

• fix: ensure proxy is updated before notifying listeners (#10267)

5.0.0-next.37

Patch Changes

• fix: skip certain slot validations for custom elements (#10207)

• fix: add compiler error for invalid <p> contents (#10201)

• fix: correctly apply event.currentTarget (#10216)

• fix: ensure derived signals properly capture consumers (#10213)

5.0.0-next.36

Patch Changes

• fix: transform textarea and contenteditable binding expressions (#10187)

• fix: improve transition outro easing (#10190)

• fix: ensure unstate() only deeply applies to plain objects and arrays (#10191)

• fix: improve invalid nested interactive element error (#10199)

• fix: react to mutated slot props in legacy mode (#10197)

5.0.0-next.35

Patch Changes

• fix: improve nested effect heuristics (#10171)

• fix: simplify event delegation logic, only delegate event attributes (#10169)

• fix: prevent transition action overfiring (#10163)

• fix: improve event handling compatibility with delegation (#10168)

• fix: ensure topological order for render effects (#10175)

5.0.0-next.34

Patch Changes

• fix: make @types/estree a dependency (#10150)

• fix: improve intro transitions on dynamic mount (#10162)

• fix: improve code generation (#10156)

• fix: adjust $inspect.with type (c7cb90c91)

• fix: improve how transitions are handled on mount (#10157)

• fix: adjust parse return type (a271878ab)

5.0.0-next.33

Patch Changes

• fix: improve ssr template code generation (#10151)

• fix: improve template literal expression output generation (#10147)

5.0.0-next.32

Patch Changes

• fix: improve outro behavior with transitions (#10139)

• chore: remove internal functions from svelte/transition exports (#10132)

• fix: further animation transition improvements (#10138)

• fix: improve animation transition heuristics (#10119)

5.0.0-next.31

Patch Changes

• fix: infer svg namespace correctly (#10027)

• fix: keep intermediate number value representations (d171a39b0)

• feat: allow modifiying derived props (#10080)

• fix: improve signal consumer tracking behavior (#10121)

• fix: support async/await in destructuring assignments (#9962)

• fix: take into account member expressions when determining legacy reactive dependencies (#10128)

• fix: make ComponentType generic optional (14dbc1be1)

• fix: silence false positive state warning (dda4ad510)

• fix: ensure nested blocks are inert during outro transitions (#10126)

• fix: improve ssr template literal generation (#10127)

5.0.0-next.30

Patch Changes

• fix: allow transition undefined payload (#10117)

• fix: apply key animations on proxied arrays (#10113)

• fix: improve internal signal dependency checking logic (#10111)

• fix: correctly call exported state (#10114)

• fix: take into account setters when spreading and binding (#10091)

• fix: transform {@render ...} expression (#10116)

5.0.0-next.29

Patch Changes

• fix: improve text node output (#10081)

• fix: improve style parser whitespace handling (#10077)

• fix: allow input elements within button elements (#10083)

• fix: support TypeScript's satisfies operator (#10068)

• fix: provide unstate in server environment (877ff1ee7)

• fix: improve key block reactivity detection (#10092)

• fix: always treat spread attributes as reactive and separate them if needed (#10071)

5.0.0-next.28

Patch Changes

• fix: deeply unstate objects passed to inspect (#10056)

• fix: handle delegated events of elements moved outside the container (#10060)

• fix: improve script lang attribute detection (#10046)

• fix: improve pseudo class parsing (#10055)

• fix: add types for popover attributes and events (#10041)

• fix: skip generating $.proxy() calls for unary and binary expressions (#9979)

• fix: allow pseudo classes after :global(..) (#10055)

• fix: bail-out event handler referencing each index (#10063)

• fix: parse :nth-of-type(xn+y) correctly (#9970)

• fix: ensure if block is executed in correct order (#10053)

5.0.0-next.27

Patch Changes

• fix: evaluate transition parameters when the transition runs (#9836)

• feat: add $state.frozen rune (#9851)

• fix: correctly transform prop fallback values that use other props (#9985)

• fix: escape template literal characters in text sequences (#9973)

• fix: inject comment in place of <noscript> in client output (#9953)

5.0.0-next.26

Patch Changes

• fix: better handle array property deletion reactivity (#9921)

• fix: improve event delegation handler hoisting (#9929)

5.0.0-next.25

Patch Changes

• fix: improve whitespace handling (#9912)

• fix: improve each block fallback handling (#9914)

• fix: cleanup each block animations on destroy (#9917)

5.0.0-next.24

Patch Changes

• fix: improve props aliasing (#9900)

• feat: add support for {@const} inside snippet block (#9904)

• fix: improve attribute directive reactivity detection (#9907)

• fix: improve $inspect batching (#9902)

• chore: improve readonly prop messaging (#9901)

• fix: better support for top-level snippet declarations (#9898)

5.0.0-next.23

Patch Changes

• feat: add gamepadconnected and gamepaddisconnected events (#9861)

• fix: improve unstate type definition (#9895)

• fix: correctly reflect readonly proxy marker (#9893)

• chore: improve each block fast-path heuristic (#9855)

• fix: improve html tag svg behaviour (#9894)

• fix: ensure class constructor values are proxied (#9888)

• fix: improve each block index handling (#9889)

5.0.0-next.22

Patch Changes

• fix: handle event hoisting props referencing (#9846)

• fix: support dynamic transition functions (#9844)

• fix: ensure action function returns object (#9848)

5.0.0-next.21

Patch Changes

• chore: refactor props handling (#9826)

• fix: improve each key animations (#9842)

• chore: avoid creating thunk for call expressions when appropriate (#9841)

• fix: improve signal consumer removal logic (#9837)

• fix: ensure computed props are wrapped in derived (#9835)

• fix: better handle unowned derived signals (#9832)

• fix: improve each block with animate (#9839)

• breaking: change $inspect API (#9838)

5.0.0-next.20

Patch Changes

• fix: better readonly checks for proxies (#9808)

• fix: prevent infinite loops stemming from invalidation method (#9811)

• fix: improve non state referenced warning (#9809)

• fix: reuse existing proxy when object has multiple references (#9821)

• fix: improve consistency issues around binding invalidation (#9810)

• fix: tweak css nth regex (#9806)

• fix: adjust children snippet default type (dcdd64548)

• fix: correctly apply scope on component children (#9824)

5.0.0-next.19

Patch Changes

• feat: add unstate utility function (#9776)

• fix: ensure proxied array length is updated (#9782)

• chore: fix compiler errors test suite (#9754)

• fix: ensure transitions properly cancel on completion (#9778)

• feat: make fallback prop values readonly (#9789)

• fix: tweak invalid dollar prefix rules around function args (#9792)

• fix: ensure generated code does not use keywords as variable names (#9790)

• feat: disallow fallback values with bindings in runes mode (#9784)

• fix: apply event attribute validation to elements only (#9772)

• fix: handle css nth-selector syntax (#9754)

• feat: throw descriptive error for using runes globals outside of Svelte-compiled files (#9773)

5.0.0-next.18

Patch Changes

• feat: proxied state (#9739)

• chore: more validation errors (#9723)

• fix: allow duplicate snippet declaration names (#9759)

• fix: ensure computed props are cached with derived (#9757)

• fix: ensure event handlers containing arguments are not hoisted (#9758)

5.0.0-next.17

Patch Changes

• fix: improve $inspect type definition (#9731)

• fix: correctly inspect derived values (#9731)

5.0.0-next.16

Patch Changes

• fix: delegate events on elements with bind-this (#9696)

• fix: ensure implicit children snippet renders correctly (#9706)

• fix: ensure $slots exists in runes mode (#9718)

• fix: allow bind:this with dynamic type on inputs (#9713)

• fix: port over props that were set prior to initialization (#9704)

• feat: $inspect rune (#9705)

• fix: keep fallback value after spread update not setting that prop (#9717)

• fix: tweak const tag parsing (#9715)

• chore: remove redundant hydration code (#9698)

• fix: improve template text node serialization (#9722)

• fix: improve infinite loop capturing (#9721)

5.0.0-next.15

Patch Changes

• fix: add children to element typings (#9679)

• fix: handle ts expressions when dealing with runes (#9681)

5.0.0-next.14

Patch Changes

• feat: warn on references to mutated non-state in template (#9669)

• fix: prevent reactive snippet from reinitializing unnecessarily (#9665)

• fix: take event attributes into account when checking a11y (#9664)

• feat: add $effect.root rune (#9638)

• feat: support type definition in {@const} (#9609)

• feat: ignore src, srcset, and href attributes when hydrating (#9662)

• chore: bump esrap (#9649)

• chore: improve <svelte:element> generated code (#9648)

• chore: prevent some unused variable creation (#9571)

5.0.0-next.13

Patch Changes

• fix: apply keyed validation only for keyed each (#9641)

• fix: omit this bind this arg if we know it's not a signal (#9635)

• fix: improve each block index handling (#9644)

5.0.0-next.12

Patch Changes

• fix: adjust mount and createRoot types (63e583184)

• fix: remove constructor overload (cb4b1f0a1)

• fix: type-level back-compat for default slot and children prop (a3bc7d569)

5.0.0-next.11

Patch Changes

• feat: add type of $effect.active (#9624)

• fix: correct bind this multiple bindings (#9617)

• chore: reuse common templates (#9601)

• fix: handle undefined bubble events (#9614)

• fix: dont error on stores looking like runes when runes explicitly turned off (#9615)

• fix: improve member expression mutation logic (#9625)

• chore: untrack keyed validation logic (#9618)

• fix: ensure snippets have correct scope (#9623)

• fix: better attribute casing logic (#9626)

5.0.0-next.10

Patch Changes

• chore: add inline new class warning (#9583)

• fix: prevent false positives when detecting runes mode (#9599)

• fix: deconflict generated names against globals (#9570)

• chore: bump esrap (#9590)

• feat: add $effect.active rune (#9591)

• feat: add Snippet type (#9584)

• fix: adjust event delegation heuristics (#9581)

• chore: remove unused code (#9593)

• fix: adjust regex (#9572)

5.0.0-next.9

Patch Changes

• chore: more transition code-golfing (#9536)

• feat: native TypeScript support (#9482)

5.0.0-next.8

Patch Changes

• chore: rename internal object properties (#9532)

5.0.0-next.7

Patch Changes

• chore: more signal perf tuning (#9531)

• fix: address intro transition bugs (#9528)

• chore: tweak signals for better runtime perf (#9529)

5.0.0-next.6

Patch Changes

• fix: do not propagate global intro transitions (#9515)

5.0.0-next.5

Patch Changes

• fix: tweak script/style tag parsing/preprocessing logic (#9502)

• fix: emit useful error on invalid binding to derived state (#9497)

• fix: address unowned propagation signal issue (#9510)

• fix: add top level snippets to instance scope (#9467)

• fix: only treat instance context exports as accessors (#9500)

• fix: allow setting files binding for <input type="file" /> (#9463)

• fix: add missing visitor for assignments during compilation (#9511)

5.0.0-next.4

Patch Changes

• revert: address bug in before/after update (#9480)

5.0.0-next.3

Patch Changes

• chore: use internal get_descriptors helper (#9389)

• chore: improve bundle code size (#9476)

• fix: coerce attribute value to string before comparison (#9475)

• fix: handle private fields in class in .svelte.js files (#9394)

• chore: make operations lazy (#9468)

• fix: allow svelte:self in snippets (#9439)

• fix: check that snippet is not rendered as a component (#9423)

• patch: ensure keyed each block fallback to indexed each block (#9441)

• fix: allow member access on directives (#9462)

• fix: handle dynamic selects with falsy select values (#9471)

• fix: ensure dynamic attributes containing call expressions update (#9443)

• fix: corrects a beforeUpdate/afterUpdate bug (#9448)

• fix: add missing files binding (#9415)

• fix: only escape attribute values for elements, not components (#9456)

• fix: handle event attribute spreading with event delegation (#9433)

• fix: support class exports (#9465)

• fix: treat slot the same as other props (#9457)

5.0.0-next.2

Patch Changes

• breaking: remove selector api (#9426)

• fix: correct update_block index type (#9425)

• fix: tighten up signals implementation (#9417)

• fix: exclude internal props from spread attributes (#9384)

• chore: improve keyblock treeshaking (#9422)

• breaking: remove Component type, keep using SvelteComponent instead (#9413)

• fix: add snippet marker symbol to children prop (#9395)

5.0.0-next.1

Patch Changes

• breaking: svelte 5 alpha (#9381)