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fix(cloudflare): ensure HMR works when prerenderEnvironment is set to 'node' #16162

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Merged
matthewp merged 5 commits into from
Apr 1, 2026
Merged

fix(cloudflare): ensure HMR works when prerenderEnvironment is set to 'node' #16162

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7f48ea1
fix(cloudflare): ensure HMR works when `prerenderEnvironment` is set …
rururux Mar 31, 2026
d24838a
Merge branch 'main' into cf-node-prerender-hmr
matthewp Mar 31, 2026
b7478fb
Merge branch 'main' into cf-node-prerender-hmr
rururux Mar 31, 2026
61eb3b8
Merge branch 'main' into cf-node-prerender-hmr
rururux Apr 1, 2026
8442198
Merge branch 'main' into cf-node-prerender-hmr
matthewp Apr 1, 2026
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5 changes: 5 additions & 0 deletions .changeset/fresh-balloons-glow.md
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Original file line number Diff line number Diff line change
@@ -0,0 +1,5 @@
---
'astro': patch
---

Fixes an issue where HMR would not trigger when modifying files while using @astrojs/cloudflare with prerenderEnvironment: 'node' enabled.
34 changes: 34 additions & 0 deletions packages/astro/e2e/cloudflare-node-prerender-hmr.test.js
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import { expect } from '@playwright/test';
import { testFactory } from './test-utils.js';

const test = testFactory(import.meta.url, {
root: './fixtures/cloudflare-node-prerender-hmr/',
devToolbar: {
enabled: false,
},
});

let devServer;

test.beforeAll(async ({ astro }) => {
devServer = await astro.startDevServer();
});

test.afterAll(async () => {
await devServer.stop();
});

test.describe('Astro page', () => {
test('refresh with HMR', async ({ page, astro }) => {
await page.goto(astro.resolveUrl('/'));

const h = page.locator('h1');
await expect(h, 'original text set').toHaveText('Original content');

await astro.editFile('./src/pages/index.astro', (original) =>
original.replaceAll('Original', 'Updated'),
);

await expect(h, 'text changed').toHaveText('Updated content');
});
});
9 changes: 9 additions & 0 deletions packages/astro/e2e/fixtures/cloudflare-node-prerender-hmr/astro.config.mjs
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@@ -0,0 +1,9 @@
// @ts-check
import cloudflare from '@astrojs/cloudflare';
import { defineConfig } from 'astro/config';

export default defineConfig({
adapter: cloudflare({
prerenderEnvironment: 'node',
}),
});
13 changes: 13 additions & 0 deletions packages/astro/e2e/fixtures/cloudflare-node-prerender-hmr/package.json
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{
"name": "@test/astro-cloudflare-node-prerender-mdx",
"version": "0.0.0",
"private": true,
"scripts": {
"dev": "astro dev",
"build": "astro build"
},
"dependencies": {
"@astrojs/cloudflare": "workspace:*",
"astro": "workspace:*"
}
}
6 changes: 6 additions & 0 deletions packages/astro/e2e/fixtures/cloudflare-node-prerender-hmr/src/pages/index.astro
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@@ -0,0 +1,6 @@
---
---
<html>
<head><title>Original content</title></head>
<body><h1>Original content</h1></body>
</html>
4 changes: 2 additions & 2 deletions packages/astro/src/vite-plugin-hmr-reload/index.ts
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Original file line number Diff line number Diff line change
@@ -1,7 +1,7 @@
import type { EnvironmentModuleNode, Plugin } from 'vite';
import { ASTRO_VITE_ENVIRONMENT_NAMES } from '../core/constants.js';
import { VIRTUAL_PAGE_RESOLVED_MODULE_ID } from '../vite-plugin-pages/const.js';
import { getDevCssModuleNameFromPageVirtualModuleName } from '../vite-plugin-css/util.js';
import { isAstroServerEnvironment } from '../environments.js';

/**
* The very last Vite plugin to reload the browser if any SSR-only module are updated
Expand All @@ -15,7 +15,7 @@ export default function hmrReload(): Plugin {
hotUpdate: {
order: 'post',
handler({ modules, server, timestamp }) {
if (this.environment.name !== ASTRO_VITE_ENVIRONMENT_NAMES.ssr) return;
if (!isAstroServerEnvironment(this.environment)) return;

let hasSsrOnlyModules = false;

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9 changes: 9 additions & 0 deletions pnpm-lock.yaml
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