Prevent ?inline and ?raw CSS from being bundled as CSS

.changeset/big-rocks-do.md

@@ -0,0 +1,5 @@
+---
+'astro': patch
+---
+
+Prevent ?inline and ?raw CSS from being bundled as CSS

packages/astro/src/core/build/plugins/plugin-css.ts

@@ -2,7 +2,7 @@ import * as crypto from 'node:crypto';
 import * as npath from 'node:path';
 import type { GetModuleInfo } from 'rollup';
 import { Plugin as VitePlugin, ResolvedConfig, transformWithEsbuild } from 'vite';
-import { isCSSRequest } from '../../render/util.js';
+import { isBuildableCSSRequest } from '../../render/dev/util.js';
 import type { BuildInternals } from '../internal';
 import type { AstroBuildPlugin } from '../plugin';
 import type { PageBuildData, StaticBuildOptions } from '../types';
@@ -66,7 +66,7 @@ export function rollupPluginAstroBuildCSS(options: PluginOptions): VitePlugin[]
 					after(id, meta) {
 						// For CSS, create a hash of all of the pages that use it.
 						// This causes CSS to be built into shared chunks when used by multiple pages.
-						if (isCSSRequest(id)) {
+						if (isBuildableCSSRequest(id)) {
 							for (const [pageInfo] of walkParentInfos(id, {
 								getModuleInfo: meta.getModuleInfo,
 							})) {

packages/astro/src/core/render/dev/css.ts

@@ -3,7 +3,7 @@ import type { ModuleLoader } from '../../module-loader/index';
 import path from 'path';
 import { RuntimeMode } from '../../../@types/astro.js';
 import { viteID } from '../../util.js';
-import { STYLE_EXTENSIONS } from '../util.js';
+import { isCSSRequest } from './util.js';
 import { crawlGraph } from './vite.js';
 
 /** Given a filePath URL, crawl Vite’s module graph to find all style imports. */
@@ -16,8 +16,7 @@ export async function getStylesForURL(
 	const importedStylesMap = new Map<string, string>();
 
 	for await (const importedModule of crawlGraph(loader, viteID(filePath), true)) {
-		const ext = path.extname(importedModule.url).toLowerCase();
-		if (STYLE_EXTENSIONS.has(ext)) {
+		if (isCSSRequest(importedModule.url)) {
 			let ssrModule: Record<string, any>;
 			try {
 				// The SSR module is possibly not loaded. Load it if it's null.

packages/astro/src/core/render/dev/util.ts

@@ -0,0 +1,9 @@
+import { isCSSRequest } from 'vite';
+
+const rawRE = /(?:\?|&)raw(?:&|$)/;
+const inlineRE = /(?:\?|&)inline\b/;
+
+export { isCSSRequest };
+
+export const isBuildableCSSRequest = (request: string): boolean => isCSSRequest(request) &&
+	!rawRE.test(request) && !inlineRE.test(request);

packages/astro/src/core/render/dev/vite.ts

@@ -4,7 +4,7 @@ import npath from 'path';
 import { PROPAGATED_ASSET_FLAG } from '../../../content/consts.js';
 import { SUPPORTED_MARKDOWN_FILE_EXTENSIONS } from '../../constants.js';
 import { unwrapId } from '../../util.js';
-import { STYLE_EXTENSIONS } from '../util.js';
+import { isCSSRequest } from './util.js';
 
 /**
  * List of file extensions signalling we can (and should) SSR ahead-of-time
@@ -43,7 +43,7 @@ export async function* crawlGraph(
 		}
 		if (id === entry.id) {
 			scanned.add(id);
-			const entryIsStyle = STYLE_EXTENSIONS.has(npath.extname(id));
+			const entryIsStyle = isCSSRequest(id);
 			for (const importedModule of entry.importedModules) {
 				// some dynamically imported modules are *not* server rendered in time
 				// to only SSR modules that we can safely transform, we check against
@@ -57,7 +57,7 @@ export async function* crawlGraph(
 					// Tools like Tailwind might add HMR dependencies as `importedModules`
 					// but we should skip them--they aren't really imported. Without this,
 					// every hoisted script in the project is added to every page!
-					if (entryIsStyle && !STYLE_EXTENSIONS.has(npath.extname(importedModulePathname))) {
+					if (entryIsStyle && !isCSSRequest(importedModulePathname)) {
 						continue;
 					}
 					if (fileExtensionsToSSR.has(npath.extname(importedModulePathname))) {

packages/astro/test/css-inline.test.js

@@ -0,0 +1,28 @@
+import { expect } from 'chai';
+import * as cheerio from 'cheerio';
+import { loadFixture } from './test-utils.js';
+
+describe('Importing raw/inlined CSS', () => {
+	let fixture;
+
+	before(async () => {
+		fixture = await loadFixture({
+			root: './fixtures/css-inline/',
+		});
+		await fixture.build();
+	});
+
+	it('?inline is imported as a string', async () => {
+		const html = await fixture.readFile('/index.html');
+		const $ = cheerio.load(html);
+
+		expect($('#inline').text()).to.contain('tomato');
+	});
+
+	it('?raw is imported as a string', async () => {
+		const html = await fixture.readFile('/index.html');
+		const $ = cheerio.load(html);
+
+		expect($('#raw').text()).to.contain('plum');
+	});
+});

packages/astro/test/fixtures/css-inline/package.json

@@ -0,0 +1,8 @@
+{
+  "name": "@test/css-inline",
+  "version": "0.0.0",
+  "private": true,
+  "dependencies": {
+    "astro": "workspace:*"
+  }
+}

packages/astro/test/fixtures/css-inline/src/inline.css

@@ -0,0 +1,3 @@
+body {
+	background: tomato;
+}

packages/astro/test/fixtures/css-inline/src/layouts/Layout.astro

@@ -0,0 +1,35 @@
+---
+export interface Props {
+	title: string;
+}
+
+const { title } = Astro.props;
+---
+
+<!DOCTYPE html>
+<html lang="en">
+	<head>
+		<meta charset="UTF-8" />
+		<meta name="viewport" content="width=device-width" />
+		<link rel="icon" type="image/svg+xml" href="/favicon.svg" />
+		<meta name="generator" content={Astro.generator} />
+		<title>{title}</title>
+	</head>
+	<body>
+		<slot />
+	</body>
+</html>
+<style is:global>
+	:root {
+		--accent: 124, 58, 237;
+		--accent-gradient: linear-gradient(45deg, rgb(var(--accent)), #da62c4 30%, white 60%);
+	}
+	html {
+		font-family: system-ui, sans-serif;
+		background-color: #F6F6F6;
+	}
+	code {
+		font-family: Menlo, Monaco, Lucida Console, Liberation Mono, DejaVu Sans Mono,
+			Bitstream Vera Sans Mono, Courier New, monospace;
+	}
+</style>

packages/astro/test/fixtures/css-inline/src/pages/index.astro

@@ -0,0 +1,19 @@
+---
+import Layout from '../layouts/Layout.astro';
+import inline from '../inline.css?inline';
+import raw from '../raw.css?raw';
+---
+<Layout title="Welcome to Astro.">
+	<main>
+	<h1>Welcome to Astro</h1>
+	<p>
+	This are some `?inline` styles to show as object:
+	</p>
+	<p id="inline">
+		{inline}
+	</p>
+	<p id="raw">
+		{raw}
+	</p>
+	</main>
+</Layout>

packages/astro/test/fixtures/css-inline/src/raw.css

@@ -0,0 +1,3 @@
+main {
+	background: plum;
+}