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‎.changeset/chatty-ghosts-unite.md

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'svelte': patch
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feat: skip pending block for already-resolved promises

‎.changeset/fresh-wombats-learn.md

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"svelte": patch
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fix: allow leading and trailing comments in mustache expression

‎.changeset/giant-jars-applaud.md

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fix: ensure hydration walks all nodes

‎.changeset/hip-months-breathe.md

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fix: show correct errors for invalid runes in `.svelte.js` files

‎.changeset/itchy-lemons-punch.md

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fix: always pass original component to HMR wrapper

‎.changeset/little-seals-reflect.md

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feat: add ability to ignore warnings through `warningFilter` compiler option

‎.changeset/perfect-actors-bake.md

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breaking: use structuredClone inside `$state.snapshot`

‎.changeset/perfect-hats-dance.md

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fix: prevent whitespaces merging across component boundaries

‎.changeset/pre.json

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"calm-ravens-sneeze",
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"chatty-beans-divide",
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"chatty-cups-drop",
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"chatty-ghosts-unite",
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"chatty-sloths-allow",
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"chatty-taxis-juggle",
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"chilled-pumas-invite",
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"fresh-impalas-bow",
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"fresh-walls-bathe",
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"fresh-weeks-trade",
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"fresh-wombats-learn",
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"friendly-candles-relate",
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"friendly-clouds-rhyme",
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"friendly-lies-camp",
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"gentle-trees-exercise",
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"gentle-wasps-pull",
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"giant-bananas-turn",
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"giant-jars-applaud",
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"giant-moons-own",
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"giant-planets-shake",
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"giant-plants-grin",
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"heavy-ears-rule",
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"hip-balloons-begin",
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"hip-garlics-tap",
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"hip-months-breathe",
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"hip-pumpkins-boil",
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"honest-buses-add",
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"honest-dragons-turn",
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"light-pens-watch",
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"little-ligers-exist",
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"little-pans-jog",
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"little-seals-reflect",
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"long-buckets-lay",
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"long-carrots-sneeze",
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"long-crews-return",
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"orange-masks-exercise",
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"orange-yaks-protect",
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"orange-zoos-heal",
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"perfect-actors-bake",
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"perfect-hats-dance",
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"pink-bikes-agree",
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"pink-goats-promise",
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"pink-mayflies-tie",
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"short-buses-camp",
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"short-countries-rush",
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"shy-fishes-drive",
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"shy-scissors-smile",
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"silent-apes-report",
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"silent-hats-stare",
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"silent-rabbits-join",
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"thin-foxes-lick",
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"thin-spoons-float",
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"thin-years-rhyme",
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"thirty-dogs-whisper",
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"thirty-flies-push",
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"thirty-flowers-sit",
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"thirty-ghosts-fix",
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"tough-buckets-thank",
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"tough-radios-punch",
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"tough-tomatoes-explain",
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"tricky-avocados-play",
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"tricky-ears-shout",
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"tricky-laws-bathe",
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"twelve-beans-drive",
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"wet-games-fly",
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"wet-pears-remain",
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"wet-wombats-repeat",
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"wicked-bikes-matter",
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"wicked-clouds-exercise",
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"wicked-doors-train",
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"wicked-emus-drive",
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"witty-steaks-dream",
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"witty-tomatoes-care",
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"witty-years-crash",
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"yellow-bananas-rhyme",
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"yellow-pugs-raise",
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"yellow-rockets-sit",
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"yellow-taxis-double",

‎.changeset/shy-scissors-smile.md

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fix: properly validate snippet/slot interop

‎.changeset/thirty-dogs-whisper.md

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fix: detect mutations within assignment expressions

‎.changeset/tricky-avocados-play.md

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fix: cache call expressions in render tag arguments

‎.changeset/wicked-carrots-explain.md

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fix: ensure previous transitions are properly aborted

‎.changeset/yellow-bananas-rhyme.md

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fix: run animations in microtask so that deferred transitions can measure nodes correctly

‎documentation/docs/03-runes/01-state.md

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<button onclick={() => (entries[1].text = 'baz')}>change second entry text</button>
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```
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> Only POJOs (plain of JavaScript objects) are made deeply reactive. Reactivity will stop at class boundaries and leave those alone
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> Only POJOs (plain old JavaScript objects) are made deeply reactive. Reactivity will stop at class boundaries and leave those alone
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## `$state.frozen`
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State declared with `$state.frozen` cannot be mutated; it can only be _reassigned_. In other words, rather than assigning to a property of an object, or using an array method like `push`, replace the object or array altogether if you'd like to update it:
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```svelte
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<script>
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let entries = $state([
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{ id: 1, text: 'foo' },
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{ id: 2, text: 'bar' }
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]);
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</script>
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```js
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let person = $state.frozen({
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name: 'Heraclitus',
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age: 49
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});
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{#each entries as entry (entry.id)}
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{entry.text}
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{/each}
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// this will have no effect (and will throw an error in dev)
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person.age += 1;
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<button onclick={() => (entries = [entries[0], { id: entries[1].id, text: 'baz' }])}
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>change second entry text</button
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>
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// this will work, because we're creating a new person
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person = {
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name: 'Heraclitus',
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age: 50
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};
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This can improve performance with large arrays and objects that you weren't planning to mutate anyway, since it avoids the cost of making them reactive. Note that frozen state can _contain_ reactive state (for example, a frozen array of reactive objects).
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> Objects and arrays passed to `$state.frozen` will be shallowly frozen using `Object.freeze()`. If you don't want this, pass in a clone of the object or array instead.
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In development mode, the argument to `$state.frozen` will be shallowly frozen with `Object.freeze()`, to make it obvious if you accidentally mutate it.
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> Objects and arrays passed to `$state.frozen` will have a `Symbol` property added to them to signal to Svelte that they are frozen. If you don't want this, pass in a clone of the object or array instead. The argument cannot be an existing state proxy created with `$state(...)`.
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## `$state.snapshot`
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‎documentation/docs/03-runes/02-side-effects.md

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<script>
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let div = $state();
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let messages = $state([]);
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// reference `messages` so that this code re-runs whenever it changes
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messages;
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// reference `messages` array length so that this code re-runs whenever it changes
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messages.length;
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if (div.offsetHeight + div.scrollTop > div.scrollHeight - 20) {

‎packages/svelte/CHANGELOG.md

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# svelte
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## 5.0.0-next.186
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### Patch Changes
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- feat: skip pending block for already-resolved promises ([#12274](https://github.com/sveltejs/svelte/pull/12274))
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- feat: add ability to ignore warnings through `warningFilter` compiler option ([#12296](https://github.com/sveltejs/svelte/pull/12296))
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- fix: run animations in microtask so that deferred transitions can measure nodes correctly ([#12453](https://github.com/sveltejs/svelte/pull/12453))
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## 5.0.0-next.185
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### Patch Changes
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- fix: allow leading and trailing comments in mustache expression ([#11866](https://github.com/sveltejs/svelte/pull/11866))
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- fix: ensure hydration walks all nodes ([#12448](https://github.com/sveltejs/svelte/pull/12448))
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- fix: prevent whitespaces merging across component boundaries ([#12449](https://github.com/sveltejs/svelte/pull/12449))
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- fix: detect mutations within assignment expressions ([#12429](https://github.com/sveltejs/svelte/pull/12429))
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## 5.0.0-next.184
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### Patch Changes
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- fix: show correct errors for invalid runes in `.svelte.js` files ([#12432](https://github.com/sveltejs/svelte/pull/12432))
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- breaking: use structuredClone inside `$state.snapshot` ([#12413](https://github.com/sveltejs/svelte/pull/12413))
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## 5.0.0-next.183
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### Patch Changes
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- fix: properly validate snippet/slot interop ([#12421](https://github.com/sveltejs/svelte/pull/12421))
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- fix: cache call expressions in render tag arguments ([#12418](https://github.com/sveltejs/svelte/pull/12418))
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- fix: optimize `bind:group` ([#12406](https://github.com/sveltejs/svelte/pull/12406))
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## 5.0.0-next.182
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### Patch Changes

‎packages/svelte/messages/client-errors/errors.md

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> The `%rune%` rune is only available inside `.svelte` and `.svelte.js/ts` files
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## state_frozen_invalid_argument
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> The argument to `$state.frozen(...)` cannot be an object created with `$state(...)`. You should create a copy of it first, for example with `$state.snapshot`
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> Cannot set prototype of `$state` object

‎packages/svelte/package.json

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"name": "svelte",
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"description": "Cybernetically enhanced web apps",
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"license": "MIT",
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"version": "5.0.0-next.182",
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"version": "5.0.0-next.186",
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"type": "module",
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"types": "./types/index.d.ts",
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"engines": {

‎packages/svelte/scripts/process-messages/index.js

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if (comments.length > 0) {
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(ast.trailingComments ||= []).push(...comments);
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}
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// find the `export function CODE` node

‎packages/svelte/scripts/process-messages/templates/compile-warnings.js

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import { warnings, ignore_stack, ignore_map } from './state.js';
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/** @typedef {{ start?: number, end?: number }} NodeLike */
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warnings.push(
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code,
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message,
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node && node.start !== undefined ? [node.start, node.end ?? node.start] : undefined
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)
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const warning = new InternalCompileWarning(
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code,
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message,
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node && node.start !== undefined ? [node.start, node.end ?? node.start] : undefined
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);
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if (!warning_filter(warning)) return;
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warnings.push(warning);
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}
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export const codes = CODES;

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