mirror of https://github.com/sveltejs/svelte
fix: when re-connecting unowned deriveds, remove their unowned flag (#15255)
* fix: when an unowned derived is tracked again, remove unowned flag * fix: when an unowned derived is tracked again, remove unowned flag * test case * test case * cleanup unused logic * simplify * simplify * simplify * simplify * add test * fix other issue * back to original plan * Apply suggestions from code review --------- Co-authored-by: Simon H <5968653+dummdidumm@users.noreply.github.com>pull/15263/head
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---
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'svelte': patch
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---
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fix: when re-connecting unowned deriveds, remove their unowned flag
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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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async test({ assert, target }) {
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let [btn1, btn2] = target.querySelectorAll('button');
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btn1?.click();
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flushSync();
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btn2?.click();
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flushSync();
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btn1?.click();
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flushSync();
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btn1?.click();
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flushSync();
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assert.htmlEqual(
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target.innerHTML,
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`<button>linked.current</button>\n3\n<button>count</button>\n1`
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);
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}
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});
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<script>
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import { untrack } from 'svelte';
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let count = $state(0);
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let state = $state({current: count});
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let linked = $derived.by(() => {
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count;
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untrack(() => state.current = count);
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return untrack(() => state);
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});
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linked.current++;
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</script>
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<button onclick={() => linked.current++}>linked.current</button> {linked.current}
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<button onclick={() => count++}>count</button> {count}
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