mirror of https://github.com/sveltejs/svelte
feat: async fragments (#16542)
* init * fix * fix * maybe this works? * fix, minor cleanup * maybe this'll fix hydration issues? * apparently not, maybe this'll do it * add test, changeset * minor tweak * tabs * avoid timeouts in tests, they add up quickly * tweak * fix * some is more 'correct' than find * chore: remove `b.async` * simplify * apply suggestion from review Co-authored-by: Rich Harris <rich.harris@vercel.com> * Update .changeset/brave-baboons-teach.md --------- Co-authored-by: Rich Harris <rich.harris@vercel.com>pull/16560/head
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---
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'svelte': minor
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---
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feat: allow `await` inside `@const` declarations
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/** @import { AST } from '#compiler' */
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/** @import { Context } from '../types.js' */
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/**
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* @param {AST.Fragment} node
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* @param {Context} context
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*/
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export function Fragment(node, context) {
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context.next({ ...context.state, fragment: node });
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}
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import { tick } from 'svelte';
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import { test } from '../../test';
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export default test({
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html: `<h1>Loading...</h1>`,
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async test({ assert, target }) {
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await tick();
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assert.htmlEqual(target.innerHTML, `<h1>Hello, world!</h1>`);
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}
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});
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<script>
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let name = $state('world');
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</script>
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<svelte:boundary>
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{#snippet pending()}
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<h1>Loading...</h1>
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{/snippet}
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{#snippet greet()}
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{@const greeting = await `Hello, ${name}!`}
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<h1>{greeting}</h1>
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{/snippet}
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{@render greet()}
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</svelte:boundary>
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