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gyzerokFedor Nezhivoi
gyzerok
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Fedor Nezhivoi
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fix: lift unsafe_state_mutation constraints for SvelteSet and SvelteMap created inside the derived (#16221)
Co-authored-by: Fedor Nezhivoi <[email protected]>
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+418
-19
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22 files changed

+418
-19
lines changed

‎.changeset/fair-bats-visit.md‎

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---
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'svelte': patch
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---
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lift unsafe_state_mutation constraints for SvelteSet, SvelteMap, SvelteDate, SvelteURL and SvelteURLSearchParams created inside the derived

‎packages/svelte/src/reactivity/date.js‎

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/** @import { Source } from '#client' */
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import { derived } from '../internal/client/index.js';
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import { source, set } from '../internal/client/reactivity/sources.js';
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import { set, state } from '../internal/client/reactivity/sources.js';
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import { tag } from '../internal/client/dev/tracing.js';
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import { active_reaction, get, set_active_reaction } from '../internal/client/runtime.js';
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import { DEV } from 'esm-env';
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* ```
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*/
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export class SvelteDate extends Date {
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#time = source(super.getTime());
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#time = state(super.getTime());
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/** @type {Map<keyof Date, Source<unknown>>} */
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#deriveds = new Map();

‎packages/svelte/src/reactivity/map.js‎

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/** @import { Source } from '#client' */
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import { DEV } from 'esm-env';
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import { set, source } from '../internal/client/reactivity/sources.js';
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import { set, source, state } from '../internal/client/reactivity/sources.js';
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import { label, tag } from '../internal/client/dev/tracing.js';
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import { get } from '../internal/client/runtime.js';
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import { increment } from './utils.js';
@@ -54,8 +54,8 @@ import { increment } from './utils.js';
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export class SvelteMap extends Map {
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/** @type {Map<K, Source<number>>} */
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#sources = new Map();
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#version = source(0);
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#size = source(0);
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#version = state(0);
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#size = state(0);
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/**
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* @param {Iterable<readonly [K, V]> | null | undefined} [value]

‎packages/svelte/src/reactivity/set.js‎

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/** @import { Source } from '#client' */
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import { DEV } from 'esm-env';
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import { source, set } from '../internal/client/reactivity/sources.js';
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import { source, set, state } from '../internal/client/reactivity/sources.js';
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import { label, tag } from '../internal/client/dev/tracing.js';
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import { get } from '../internal/client/runtime.js';
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import { increment } from './utils.js';
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export class SvelteSet extends Set {
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/** @type {Map<T, Source<boolean>>} */
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#sources = new Map();
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#version = source(0);
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#size = source(0);
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#version = state(0);
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#size = state(0);
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/**
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* @param {Iterable<T> | null | undefined} [value]

‎packages/svelte/src/reactivity/url-search-params.js‎

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import { DEV } from 'esm-env';
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import { source } from '../internal/client/reactivity/sources.js';
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import { state } from '../internal/client/reactivity/sources.js';
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import { tag } from '../internal/client/dev/tracing.js';
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import { get } from '../internal/client/runtime.js';
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import { get_current_url } from './url.js';
@@ -34,7 +34,7 @@ export const REPLACE = Symbol();
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* ```
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*/
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export class SvelteURLSearchParams extends URLSearchParams {
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#version = DEV ? tag(source(0), 'SvelteURLSearchParams version') : source(0);
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#version = DEV ? tag(state(0), 'SvelteURLSearchParams version') : state(0);
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#url = get_current_url();
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#updating = false;

‎packages/svelte/src/reactivity/url.js‎

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import { DEV } from 'esm-env';
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import { source, set } from '../internal/client/reactivity/sources.js';
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import { set, state } from '../internal/client/reactivity/sources.js';
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import { tag } from '../internal/client/dev/tracing.js';
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import { get } from '../internal/client/runtime.js';
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import { REPLACE, SvelteURLSearchParams } from './url-search-params.js';
@@ -40,14 +40,14 @@ export function get_current_url() {
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* ```
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*/
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export class SvelteURL extends URL {
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#protocol = source(super.protocol);
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#username = source(super.username);
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#password = source(super.password);
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#hostname = source(super.hostname);
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#port = source(super.port);
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#pathname = source(super.pathname);
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#hash = source(super.hash);
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#search = source(super.search);
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#protocol = state(super.protocol);
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#username = state(super.username);
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#password = state(super.password);
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#hostname = state(super.hostname);
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#port = state(super.port);
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#pathname = state(super.pathname);
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#hash = state(super.hash);
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#search = state(super.search);
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#searchParams;
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/**

‎packages/svelte/tests/runtime-runes/samples/side-effect-derived-array/_config.js‎

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import { flushSync } from 'svelte';
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import { test } from '../../test';
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export default test({
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compileOptions: {
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dev: true,
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runes: true
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},
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test({ assert, target }) {
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const [button1, button2] = target.querySelectorAll('button');
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assert.throws(() => {
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button1?.click();
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flushSync();
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}, /state_unsafe_mutation/);
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assert.doesNotThrow(() => {
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button2?.click();
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flushSync();
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});
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}
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});

‎packages/svelte/tests/runtime-runes/samples/side-effect-derived-array/main.svelte‎

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<script>
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let visibleExternal = $state(false);
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let external = $state([]);
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const throws = $derived.by(() => {
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external.push(1);
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return external;
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});
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let visibleInternal = $state(false)
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const works = $derived.by(() => {
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let internal = $state([]);
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internal.push(1);
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return internal;
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});
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</script>
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<button onclick={() => (visibleExternal = true)}>external</button>
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{#if visibleExternal}
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{throws}
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{/if}
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<button onclick={() => (visibleInternal = true)}>internal</button>
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{#if visibleInternal}
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{works}
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{/if}
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‎packages/svelte/tests/runtime-runes/samples/side-effect-derived-date/_config.js‎

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import { flushSync } from 'svelte';
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import { test } from '../../test';
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export default test({
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compileOptions: {
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dev: true,
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runes: true
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},
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test({ assert, target }) {
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const [button1, button2] = target.querySelectorAll('button');
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assert.throws(() => {
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button1?.click();
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flushSync();
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}, /state_unsafe_mutation/);
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assert.doesNotThrow(() => {
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button2?.click();
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flushSync();
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});
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}
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});

‎packages/svelte/tests/runtime-runes/samples/side-effect-derived-date/main.svelte‎

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<script>
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import { SvelteDate } from 'svelte/reactivity';
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let visibleExternal = $state(false);
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let external = new SvelteDate();
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const throws = $derived.by(() => {
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external.setTime(12345);
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return external;
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})
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let visibleInternal = $state(false);
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const works = $derived.by(() => {
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let internal = new SvelteDate();
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internal.setTime(12345);
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return internal;
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})
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</script>
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<button onclick={() => (visibleExternal = true)}>external</button>
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{#if visibleExternal}
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{throws}
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{/if}
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<button onclick={() => (visibleInternal = true)}>internal</button>
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{#if visibleInternal}
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{works}
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{/if}
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