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fix: use runes in when detecting Svelte 5 #11028

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Nov 14, 2023
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5 changes: 5 additions & 0 deletions .changeset/beige-ties-allow.md
Original file line number Diff line number Diff line change
@@ -0,0 +1,5 @@
---
'@sveltejs/kit': patch
---

fix: use runes in when detecting Svelte 5
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This changelog message appears to be missing a

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55 changes: 42 additions & 13 deletions packages/kit/src/core/sync/write_root.js
Original file line number Diff line number Diff line change
Expand Up @@ -40,28 +40,57 @@ export function write_root(manifest_data, output) {
dedent`
<!-- This file is generated by @sveltejs/kit — do not edit it! -->
<script>
import { setContext, afterUpdate, onMount, tick } from 'svelte';
import { setContext, ${isSvelte5Plus() ? '' : 'afterUpdate, '}onMount, tick } from 'svelte';
import { browser } from '$app/environment';

// stores
export let stores;
export let page;

export let constructors;
export let components = [];
export let form;
${levels.map((l) => `export let data_${l} = null;`).join('\n')}
${
isSvelte5Plus()
? dedent`
let { stores, page, constructors, components = [], form, ${levels
.map((l) => `data_${l} = null`)
.join(', ')} } = $props();
`
: dedent`
export let stores;
export let page;

export let constructors;
export let components = [];
export let form;
${levels.map((l) => `export let data_${l} = null;`).join('\n')}
`
}

if (!browser) {
setContext('__svelte__', stores);
}

$: stores.page.set(page);
afterUpdate(stores.page.notify);
${
isSvelte5Plus()
? dedent`
if (browser) {
$effect.pre(() => stores.page.set(page));
} else {
stores.page.set(page);
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}
`
: '$: stores.page.set(page);'
}
${
isSvelte5Plus()
? dedent`
$effect(() => {
stores;page;constructors;components;form;${levels.map((l) => `data_${l}`).join(';')};
stores.page.notify();
});
`
: 'afterUpdate(stores.page.notify);'
}

let mounted = false;
let navigated = false;
let title = null;
let mounted = ${isSvelte5Plus() ? '$state(false)' : 'false'};
let navigated = ${isSvelte5Plus() ? '$state(false)' : 'false'};
let title = ${isSvelte5Plus() ? '$state(null)' : 'null'};

onMount(() => {
const unsubscribe = stores.page.subscribe(() => {
Expand Down