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fix: ensure async initial store value is noticed (#12486)
* fix: ensure async initial store value is noticed fixes #12341 * fix another casepull/12487/head
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commit
4b8674fe02
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---
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'svelte': patch
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---
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fix: ensure async initial store value is noticed
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import { test } from '../../test';
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export default test({
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mode: ['client'],
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async test({ assert, target }) {
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assert.htmlEqual(target.innerHTML, ' / ');
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await new Promise((r) => setTimeout(r, 110));
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assert.htmlEqual(target.innerHTML, '42 / 42');
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}
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});
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<script>
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function store() {
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return {
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subscribe: (cb) => {
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setTimeout(() => {
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cb(42);
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}, 100);
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return () => {};
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}
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};
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}
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const value1 = store();
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const value2 = store();
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const derivedValue = $derived($value1);
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</script>
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{$value2} / {derivedValue}
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@ -1,7 +1,18 @@
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<script>
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import { writable } from "svelte/store";
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let store = writable('store');
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let name = $derived($store); // store signal is updated during reading this, which normally errors, but shouldn't for stores
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<script>
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import { writable } from 'svelte/store';
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let store1 = writable('store');
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let store2 = {
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subscribe: (cb) => {
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cb('...');
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cb('Hello');
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return () => {};
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}
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};
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// store signal is updated during reading this, which normally errors, but shouldn't for stores
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let name = $derived($store1);
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let hello = $derived($store2);
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</script>
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<h1>Hello {name}</h1>
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<h1>{hello} {name}</h1>
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