Svelte

Summary

Fixed multiple CSS handling bugs, including escape sequences, custom property values, and namespace preservation

Summary

Fix skip controlled each fast path when another batch is pending

Summary

Fixed onerror handling and added a functional reset for failed hydration boundaries.

Summary

Added an indent option to the print function

Summary

Skip unnecessary blocker analysis during component compilation without top‑level await, improving performance.

Summary

Fixed numerous derived store and SSR transformation bugs, including proper handling of $state.eager(), declaration tags, and computed keys in keyed each blocks.

Summary

Fixed parsing and reactivity bugs: corrected {@const} end position handling, ensured reactivity context is unset after restoration, and stripped '?' from optional TypeScript script parameters for valid JavaScript output.

Summary

Ignore errors that occur in destroyed effects

Summary

Fixed effect end node tracking for async sibling components and prevented false positive reactivity loss warnings.

Summary

Fixed compile-time error on duplicate snippet/declaration tags and improved robust parsing of declaration tag contents, including whitespace and type handling.

Summary

Added support for declarations directly in Svelte templates.

Summary

Fixed multiple batch management bugs (unlinking, settling, merging, async @const blockers, component‑level effects) and improved async resolve handling and outro branch resumption.

Summary

Fix batch handling when awaiting promises and prevent false positive batch invariant errors

Summary

Fix handling of svelte:body and correct double printing of keyframe percentages.

Summary

Fixed XSS vulnerability in hydrateable content handling

Summary

Fixed multiple runtime bugs: stale promises now wait for later resolution, eager effects flush correctly in production, and obsolete async branches are aborted

Summary

Fixed derived store marking issue when an effect is updating.

Summary

Fixed child effect roots being incorrectly marked as inert

Summary

Fixed HMR updates for dynamic components.

Summary

Fix invalidation of @const tags based on visible references in legacy mode

Summary

Fix server‑side handling of bindings to prevent incorrect behavior.

Summary

Export TweenOptions, SpringOptions, SpringUpdateOptions, and Updater from svelte/motion.

Summary

Fix hydration comment handling during HMR

Summary

Added support for css, runes, and customElement compiler options as functions.

Summary

Fixed $inspect handling after top-level await to prevent build failures.

Summary

Fix select.value update on change

Summary

Fixed untrack circular dependency and added recovery from errors that corrupt the effect tree

Summary

Fixes batch processing when new root effects are scheduled

Summary

Fixes bind:this cleanup timing issue.

Summary

Fixed {@html} duplication in contenteditable elements and prevented access to inert block effects.

Summary

Fixed handling of Svelte meta after else‑if chains and preserved boundary errors for keyed each loops during async updates

Summary

Optimized parser hot paths and compiler analysis phase for faster compilation and more efficient effect scheduling

Summary

Escapes innerText and textContent bindings for contenteditable elements to prevent incorrect rendering.

Summary

Fix server context handling after async transformError

Summary

Fixed rendering of :catch in await blocks to use the correct key.

Summary

Fixed server-derived expression updates

Summary

Fix handling of shadowed function names

Summary

Added comment support in tags and enabled error‑boundary handling on the server.

Summary

Add support for TrustedHTML in {@html} expressions.

Summary

Ensure svelte:element tags are validated during SSR

Summary

Defer effects in pending boundaries proactively to improve rendering consistency

Summary

Fixed event delegation conflicts between multiple Svelte instances.

Summary

Fix handling of async functions in dev delegated event handlers

Summary

Fix crash when document.contentType is undefined

Summary

Added TrustedTypes support for HTML handling to improve security

Summary

Fix XHTML compliance: handle nodeName case sensitivity, lowercase HTML elements, and render "multiple"/"selected" attributes as empty strings

Summary

Fixed effect update depth error when using bind:value on <select> with derived state in legacy mode.

Summary

Render boolean attribute values as empty strings to ensure XHTML compliance

Summary

Added support for using createContext when instantiating components programmatically

Summary

Remove SvelteKit data‑attribute typings from elements.d.ts

Summary

Fix merging of consecutive large text nodes

Summary

Allow passing a ShadowRootInit object to the custom element shadow option

Summary

Run boundary onerror callbacks in a microtask to safely handle boundary destruction.

Summary

Fix duplication of escaped characters in the CSS AST.

Summary

Fix hydration failures with settled async blocks.

Summary

Fix export of the wait function from the internal client index

Summary

Fix hoisting of snippets above const declarations within the same block.

Summary

Exported `parseCss` from `svelte/compiler` for external use

Summary

Fix reactivity issue for selectedContent trigger.

Summary

Added customizable <select> elements.

Summary

Fix: use devalue.uneval to correctly serialize hydratable keys

Summary

Fixed reconnection of derived stores when read inside reactive contexts

Summary

Corrected type of `currentTarget` in the `on` function.

Summary

Added CSP option to the render function

Summary

Fix race condition occurring during import of AsyncLocalStorage

Summary

Fixed rescheduling of deferred effects when reviving a batch after async work.

Summary

Fix AST root start and end positions to correctly reflect the template length

Summary

Add support for <textarea wrap="off"> attribute

Summary

Fixed accessibility warning for <video> elements without src and captions

Summary

Fix correct reconciliation of each blocks after outroing branches are resumed

Summary

Move DOM effect properties to effect.nodes

Summary

Added support for locally referenced state props.

Summary

Fix array destructuring after await (issue #17254).

Summary

Fix offscreen link handling

Summary

Added a new `print(...)` utility function.

Summary

Fixed await blockers before component initialization

Summary

Introduces a new hydratable API for improved server‑side rendering hydration.

Summary

Fix eager execution of attachments and attribute effects

Summary

Fix migration of named self‑closing slots

Summary

Fix: avoid setting derived values during time traveling, preventing incorrect state updates.

Summary

Fix linked list handling of effects when updating each block

Summary

Improve performance by disabling overly eager tracing in development mode.

Summary

Fixed a bug where other batches could run while the main batch's root effects were queued.

Summary

Fixed async blocker detection, ensuring functions and await blocks respect blockers

Summary

Fixed loss of reactivity in each block when items are removed while a promise is pending

Summary

Defer document title updates until async work completes

Summary

Fixed issue where deactivating a batch also deactivated other batches

Summary

Fixed async static props/attributes to be properly awaited.

Summary

Simplify connection and disconnection logic

Summary

Fix: Fork now always accesses the correct values

Summary

Fixed treatment of blocks with async dependencies, now marking them as uncontrolled.

Summary

Fixed transformation of $bindable after await expressions

Summary

Introduced out-of-order rendering capability

Summary

Fixed handling of <svelte:head> when rendered asynchronously (issue #17052)

Summary

Improved error message for global variable assignments

Summary

Fix ignoring fork discard() after commit()

Summary

Add experimental fork API

Summary

Consider static blocks when determining transition locality

Summary

Exclude Vite‑optimized dependencies from stack traces to reduce noise

Summary

Keep batches alive until all async work finishes and ensure guards (if, each, key) run before their contents

Summary

Fix ordering of let: declarations relative to {@const} declarations

Summary

Added $state.eager(value) rune for eager state handling.

Summary

Fix hydration markers for pending SSR boundary.

Summary

Remove erroneous sync-in-async warning during server rendering

Summary

Added createContext utility for type‑safe context handling.

Summary

Add missing type definition for the `fr` attribute on SVG <radialGradient> elements.

Summary

Fix input cursor restoration for bind:value

Summary

Flush batches automatically when an async value resolves, ensuring UI updates occur promptly.

Summary

Fix hydration of each blocks inside elements

Summary

Fix flush behavior when pending boundaries resolve.

Summary

Fixed server‑side boundary pending attribute handling and allowed await in svelte:boundary without pending

Summary

Simplified batch processing logic.

Summary

Fixed derived store reads within async reactions to prevent stale values.

Summary

Fixed server rendering for {@html await ...} and async snippet content.

Summary

- Fixed restoration of hydration state after an await in <script> (issue #16806).

Summary

Fix removal of outer hydration markers

Summary

Fixed SSR context preservation when block expressions contain await.

Summary

Fixed warning emitted when unmounting a state proxy.

Summary

Add experimental asynchronous server-side rendering support.

Summary

Fixes flushing of effects scheduled during a boundary's pending phase

Summary

Fix component analysis for <object.property> syntax

Summary

Fixed $effect.pending count being sent to the correct boundary

Summary

Replace undefined with void(0) in CallExpressions to avoid unintended side‑effects.

Summary

Prevent failure when flushSync is invoked while flushing effects

Summary

Fixed async derived stores to correctly retrieve dependencies from thenable

Summary

- Fixed ordering of template effect values

Summary

Run blocks eagerly during flush to improve performance

Summary

Fix wrapping abort calls outside of reactive contexts

Summary

Added support for awaiting inside @const declarations.

Summary

Fix: Reset attribute cache after setting the related property

Summary

Fixed double event processing in Firefox caused by event objects being garbage collected.

Summary

Fixed support for await expressions inside {await ...} block arguments.

Summary

Added ability to ignore component options when using compileModule.

Summary

Throw error on duplicate class field declarations

Summary

Prevent focused input from being overwritten by its own historic values.

Summary

Fixes loss of dirty status for deferred effects.

Summary

Fixed input synchronization when bindings are updated via effect

Summary

Fix subscription detection in derived stores

Summary

Moved capture signals implementation to the legacy module.

Summary

Fixed issue where processing batches could become intertwined.

Summary

Prevent reexecution of derived stores without dependencies during component teardown

Summary

Fix: keep effect in the graph when it has an AbortController.

Summary

Fix intrinsic <svelte:...> elements to inherit from SvelteHTMLElements

Summary

Fix delegate functions with shadowed variables when declared locally

Summary

Silence $inspect errors that occur when an effect is about to be destroyed.

Summary

Avoid microtask in flushSync

Summary

Stop logging await reactivity loss warning when a signal is read inside untrack

Summary

Add $effect.pending() to Svelte's type definitions.

Summary

Fix: bound <input> elements are no longer updated when they are the source of the change.

Summary

Added support for using await in components when the experimental.async compiler option is enabled

Summary

Fix autofocus accessibility warning in <dialog>

Summary

Simplify reaction/source ownership tracking

Summary

Fixed association of sources in Spring, Tween, SvelteMap, and SvelteSet to use the correct reaction

Summary

Fix abort and reschedule of effect processing after a state change within user effects (issue 16280).

Summary

Fix mounting handling for select option in attribute effects.

Summary

Bumped esrap dependency to address issue #16295.

Summary

Add parent hierarchy to Svelte meta objects

Summary

Add new getAbortSignal() utility function (feat).

Summary

Fixes a bug where unowned derived stores couldn't add themselves as reactions while connected.

Summary

Fixed $inspect.with untracking and added a safety check for unsafe mutations.

Summary

Fix CSS class matching regression

Summary

Fixed class and style directives to correctly match attribute selectors

Summary

Updated handling of spread non‑delegated event handlers and removed undefined attributes during hydration

Summary

Fix proxy state setting within parent contexts

Summary

Stop eager execution of derived stores on resume

Summary

Add missing TypeScript typings for certain dimension bindings.

Summary

Correctly tag private class state fields

Summary

Add source name logging to $inspect.trace for better traceability.

Summary

Fix reset flushing when flushSync is called without a scheduled effect

Summary

Update esrap dependency to latest version

Summary

Updated Acorn parser ecmaVersion to enable parsing of import attributes

Summary

Fixed visit expression handling when destructuring state declarations.

Summary

Fix parent boundary invocation for derived stores that throw errors (issue #16091)

Summary

Reverted the "enable TS autocomplete for Svelte HTML element definitions" feature (issue 16063).

Summary

Fix recursion error in the EachBlock visitor to prevent crashes

Summary

Fixed correct transformation of reassigned class fields in SSR mode

Summary

Fixes handling of transitive dependencies inside each blocks when operating in legacy mode.

Summary

Fix transition flicker by applying fill:'forwards' to animations.

Summary

Fix: Correct handling of expressions in Svelte effects, ensuring they are only treated as dynamic when not known to be static.

Summary

Fixes issue where only the select option is selected when 'value' exists in the next array.

Summary

Fixed bind:value on select elements when used with stores

Summary

Fix handling of falsy attachments on components

Summary

Fix handling of derived destructured iterators.

Summary

Fixed defaultChecked handling to correctly coerce values to boolean.

Summary

Fixed TypeScript support in customElement.extend option.

Summary

Fixed parsing of escaped Unicode characters in CSS selectors.

Summary

Fixes server-side derived stores to be lazy again

Summary

Added XHTML compliance support

Summary

Simplify <pre> cleaning logic.

Summary

Warn when an invalid value is supplied to a <select multiple> element

Summary

Fix event listeners are properly removed in Component's removeEventListener method.

Summary

Added warnings for implicitly closed tags.

Summary

Fixes auto-parentheses insertion for special MediaQuery keywords

Summary

Added support for declaring state fields inside class constructors.

Summary

Fix falsy attachment types handling

Summary

Add typeParams to SnippetBlock for legacy parser

Summary

Added support for generics in snippets, enabling type-parameterized snippet definitions.

Summary

Add attachment support (PR #15000).

Summary

Fix removal of unnecessary CSP privilege guards when deleting event attributes

Summary

Fixed ownership validator mutation array by using transform.read.

Summary

Fix proxify of value in assignment shorthands for private fields

Summary

Fix handling of nullish expressions by treating them as empty strings.

Summary

Avoid unnecessary microtasks when flushing synchronously.

Summary

Fixes false positive unused warnings for selector lists inside :global with multiple items.

Summary

Fixed <svelte:boundary> to correctly remove error content in production.

Summary

Partially evaluates additional expressions, improving compile‑time optimizations.

Summary

Fix server output snippets by using a function declaration, eliminating Temporal Dead Zone (TDZ) violations.

Summary

Switch to pkg.imports for loading common modules

Summary

Add default parameters for HTML blocks.

Summary

Adds partial evaluation of certain expressions

Summary

Fixed server validation of head snippets

Summary

Fix validation of undefined snippet parameters when a default value is provided.

Summary

Fixed incorrect state reference message in local updates

Summary

Added `css.hasGlobal` flag to compile output.

Summary

Improve internal set versioning mechanism

Summary

Fixed hydration mismatches in await blocks

Summary

Set derived stores to CLEAN state when assigned

Summary

Allow $.state and $.derived to be tree‑shaken

Summary

Fix memory leak caused by untracked writes.

Summary

Fix ensures clearing of old values occurs independently of root flushes.

Summary

Fix ignored generic type arguments when generating the AST.

Summary

Add setters to $derived class properties

Summary

Fix support for TypeScript type assertions (issue #15642)

Summary

Fix: Prevent state runes from being called with spread syntax (issue #15585).

Summary

Add support for migrating reassigned derived stores to the new `$derived` syntax

Summary

Fixed dev server error when retrieving the proxied value of an iframe's contentWindow.

Summary

Added writable capability to derived stores (feat #15570).

Summary

Fix constructor to use get for derived stores.

Summary

Allow state created in deriveds/effects to be read/written locally without causing self‑invalidation

Summary

Fixes hoisting of listeners that access non‑hoistable snippets, preventing runtime errors.

Summary

Fix effect invalidation when child effects update parent dependencies.

Summary

Fix inconsistency between effect return values and their cleanup functions

Summary

Skip logging when the state contains only literals

Summary

Memoize clsx calls to improve performance.

Summary

Fixed a bug where expressions in Svelte templates were incorrectly deduplicated.

Summary

Corrected effect root scheduling to follow component tree order.

Summary

Fixes incorrect setting of the 'is updating' flag before flushing root effects.

Summary

Switches the Acorn TypeScript plugin used for parsing

Summary

Add an `idPrefix` option to the render function for custom ID prefixes

Summary

Chore: Reduce hydration comment for {:else if} blocks.