invalidate implicit dependencies in server load functions

.changeset/friendly-cycles-roll.md

@@ -0,0 +1,5 @@
+---
+'@sveltejs/kit': patch
+---
+
+[fix] invalidate implicit dependencies in server load functions

packages/kit/src/runtime/server/page/load_data.js

@@ -33,6 +33,12 @@ export async function load_server_data({ event, options, state, node, parent })
 
 	const result = await node.server.load?.call(null, {
 		...event,
+		fetch: (info, init) => {
+			const url = new URL(info instanceof Request ? info.url : info, event.url);
+			uses.dependencies.add(url.href);
+
+			return event.fetch(info, init);
+		},
 		/** @param {string[]} deps */
 		depends: (...deps) => {
 			for (const dep of deps) {

packages/kit/test/apps/basics/src/routes/load/invalidation/server-fetch/+page.server.js

@@ -0,0 +1,5 @@
+/** @type {import('./$types').PageServerLoad} */
+export async function load({ fetch }) {
+	const res = await fetch('/load/invalidation/server-fetch/count.json');
+	return res.json();
+}

packages/kit/test/apps/basics/src/routes/load/invalidation/server-fetch/+page.svelte

@@ -0,0 +1,5 @@
+<script>
+	export let data;
+</script>
+
+<p data-testid="count">{data.count}</p>

packages/kit/test/apps/basics/src/routes/load/invalidation/server-fetch/count.json/+server.js

@@ -0,0 +1,9 @@
+import { json } from '@sveltejs/kit';
+
+let count = 0;
+
+/** @type {import('./$types').RequestHandler} */
+export function GET({ url }) {
+	if (url.searchParams.has('reset')) count = 0;
+	return json({ count: count++ });
+}

packages/kit/test/apps/basics/test/client.test.js

@@ -1022,6 +1022,16 @@ test.describe('Invalidation', () => {
 		expect(shared).not.toBe(next_shared);
 	});
 
+	test('fetch in server load can be invalidated', async ({ page, app, request }) => {
+		await request.get('/load/invalidation/server-fetch/count.json?reset');
+		await page.goto('/load/invalidation/server-fetch');
+		const selector = '[data-testid="count"]';
+
+		expect(await page.textContent(selector)).toBe('1');
+		await app.invalidate('/load/invalidation/server-fetch/count.json');
+		expect(await page.textContent(selector)).toBe('2');
+	});
+
 	test('+layout.js is re-run when shared dep is invalidated', async ({ page }) => {
 		await page.goto('/load/invalidation/depends');
 		const server = await page.textContent('p.server');

packages/kit/test/prerendering/basics/test/test.js

@@ -188,7 +188,9 @@ test('fetches data from local endpoint', () => {
 			{
 				type: 'data',
 				data: [{ message: 1 }, 'hello'],
-				uses: {}
+				uses: {
+					dependencies: ['http://example.com/origin/message.json']
+				}
 			}
 		]
 	});