svelte/CHANGELOG.md

Cybernetically enhanced web apps

# Svelte changelog

## 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 idiosyncracies

## 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 non-existent 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)