test: added

test/ConfigTestCases.template.js

@@ -442,6 +442,8 @@ const describeCases = config => {
 											baseModuleScope.document = globalContext.document;
 											baseModuleScope.setTimeout = globalContext.setTimeout;
 											baseModuleScope.clearTimeout = globalContext.clearTimeout;
+											baseModuleScope.getComputedStyle =
+												globalContext.getComputedStyle;
 											baseModuleScope.URL = URL;
 											baseModuleScope.Worker =
 												require("./helpers/createFakeWorker")({
@@ -540,6 +542,7 @@ const describeCases = config => {
 													}
 													if (esmMode === "unlinked") return esm;
 													return (async () => {
+														if (esmMode === "unlinked") return esm;
 														await esm.link(
 															async (specifier, referencingModule) => {
 																return await asModule(

test/configCases/css/basic-esm-target-node/index.js

@@ -0,0 +1,9 @@
+import * as style from "./style.css";
+
+it("should compile and load style on demand", done => {
+	expect(style).toEqual(nsObj({}));
+	import("./style2.css").then(x => {
+		expect(x).toEqual(nsObj({}));
+		done();
+	}, done);
+});

test/configCases/css/basic-esm-target-node/style-imported.css

@@ -0,0 +1,3 @@
+body {
+	margin: 10px;
+}

test/configCases/css/basic-esm-target-node/style.css

@@ -0,0 +1,4 @@
+@import "style-imported.css";
+body {
+	background: red;
+}

test/configCases/css/basic-esm-target-node/style2-imported.css

@@ -0,0 +1,3 @@
+body {
+	padding: 20px 10px;
+}

test/configCases/css/basic-esm-target-node/style2.css

@@ -0,0 +1,4 @@
+@import "./style2-imported.css";
+body {
+	color: green;
+}

test/configCases/css/basic-esm-target-node/webpack.config.js

@@ -0,0 +1,13 @@
+/** @type {import("../../../../").Configuration} */
+module.exports = {
+	target: "node",
+	mode: "development",
+	experiments: {
+		outputModule: true,
+		css: true
+	},
+	output: {
+		module: true,
+		chunkFormat: "module"
+	}
+};

test/configCases/css/basic-esm-target-web/index.js

@@ -0,0 +1,14 @@
+import * as style from "./style.css";
+
+it("should compile and load style on demand", done => {
+	expect(style).toEqual(nsObj({}));
+	import("./style2.css").then(x => {
+		expect(x).toEqual(nsObj({}));
+		const style = getComputedStyle(document.body);
+		expect(style.getPropertyValue("background")).toBe(" red");
+		expect(style.getPropertyValue("margin")).toBe(" 10px");
+		expect(style.getPropertyValue("color")).toBe(" green");
+		expect(style.getPropertyValue("padding")).toBe(" 20px 10px");
+		done();
+	}, done);
+});

test/configCases/css/basic-esm-target-web/style-imported.css

@@ -0,0 +1,3 @@
+body {
+	margin: 10px;
+}

test/configCases/css/basic-esm-target-web/style.css

@@ -0,0 +1,4 @@
+@import "style-imported.css";
+body {
+	background: red;
+}

test/configCases/css/basic-esm-target-web/style2-imported.css

@@ -0,0 +1,3 @@
+body {
+	padding: 20px 10px;
+}

test/configCases/css/basic-esm-target-web/style2.css

@@ -0,0 +1,4 @@
+@import "./style2-imported.css";
+body {
+	color: green;
+}

test/configCases/css/basic-esm-target-web/test.config.js

@@ -0,0 +1,8 @@
+module.exports = {
+	moduleScope(scope) {
+		const link = scope.window.document.createElement("link");
+		link.rel = "stylesheet";
+		link.href = "bundle0.css";
+		scope.window.document.head.appendChild(link);
+	}
+};

test/configCases/css/basic-esm-target-web/webpack.config.js

@@ -0,0 +1,13 @@
+/** @type {import("../../../../").Configuration} */
+module.exports = {
+	target: "web",
+	mode: "development",
+	experiments: {
+		outputModule: true,
+		css: true
+	},
+	output: {
+		module: true,
+		chunkFormat: "module"
+	}
+};

test/configCases/css/prefetch-preload-module/chunk1-a.css

@@ -0,0 +1,3 @@
+a {
+	color: red;
+}

test/configCases/css/prefetch-preload-module/chunk1.css

@@ -0,0 +1,3 @@
+a {
+	color: red;
+}

test/configCases/css/prefetch-preload-module/chunk1.mjs

@@ -0,0 +1,6 @@
+export default function() {
+	import(/* webpackPrefetch: true, webpackChunkName: "chunk1-a" */ "./chunk1-a.mjs");
+	import(/* webpackPreload: true, webpackChunkName: "chunk1-b" */ "./chunk1-b.mjs");
+	import(/* webpackPreload: true, webpackChunkName: "chunk1-a-css" */ "./chunk1-a.css");
+	import(/* webpackPrefetch: 10, webpackChunkName: "chunk1-c" */ "./chunk1-c.mjs");
+}

test/configCases/css/prefetch-preload-module/chunk2.css

@@ -0,0 +1,3 @@
+a {
+	color: blue;
+}

test/configCases/css/prefetch-preload-module/chunk2.mjs

@@ -0,0 +1,4 @@
+export default function() {
+	import(/* webpackPrefetch: true, webpackChunkName: "chunk1-a" */ "./chunk1-a.mjs");
+	import(/* webpackPreload: true, webpackChunkName: "chunk1-b" */ "./chunk1-b.mjs");
+}

test/configCases/css/prefetch-preload-module/index.mjs

@@ -0,0 +1,68 @@
+// This config need to be set on initial evaluation to be effective
+__webpack_nonce__ = "nonce";
+__webpack_public_path__ = "https://example.com/public/path/";
+
+it("should prefetch and preload child chunks on chunk load", () => {
+	let link, script;
+
+	expect(document.head._children).toHaveLength(1);
+
+	// Test prefetch
+	link = document.head._children[0];
+	expect(link._type).toBe("link");
+	expect(link.rel).toBe("prefetch");
+	expect(link.as).toBe("style");
+	expect(link.href).toBe("https://example.com/public/path/chunk2-css.css");
+
+	const promise = import(
+		/* webpackChunkName: "chunk1", webpackPrefetch: true */ "./chunk1.mjs"
+	);
+
+	expect(document.head._children).toHaveLength(2);
+
+	// Test normal script loading
+	link = document.head._children[1];
+	expect(link._type).toBe("link");
+	expect(link.rel).toBe("preload");
+	expect(link.as).toBe("style");
+	expect(link.href).toBe("https://example.com/public/path/chunk1-a-css.css");
+
+	return promise.then(() => {
+		expect(document.head._children).toHaveLength(2);
+
+		const promise2 = import(
+			/* webpackChunkName: "chunk1", webpackPrefetch: true */ "./chunk1.mjs"
+		);
+
+		// Loading chunk1 again should not trigger prefetch/preload
+		expect(document.head._children).toHaveLength(2);
+
+		const promise3 = import(/* webpackChunkName: "chunk2" */ "./chunk2.mjs");
+
+		expect(document.head._children).toHaveLength(2);
+
+		return promise3.then(() => {
+			expect(document.head._children).toHaveLength(2);
+
+			const promise4 = import(/* webpackChunkName: "chunk1-css" */ "./chunk1.css");
+
+			expect(document.head._children).toHaveLength(3);
+
+			link = document.head._children[2];
+			expect(link._type).toBe("link");
+			expect(link.rel).toBe("stylesheet");
+			expect(link.href).toBe("https://example.com/public/path/chunk1-css.css");
+			expect(link.crossOrigin).toBe("anonymous");
+
+			const promise5 = import(/* webpackChunkName: "chunk2-css", webpackPrefetch: true */ "./chunk2.css");
+
+			expect(document.head._children).toHaveLength(4);
+
+			link = document.head._children[3];
+			expect(link._type).toBe("link");
+			expect(link.rel).toBe("stylesheet");
+			expect(link.href).toBe("https://example.com/public/path/chunk2-css.css");
+			expect(link.crossOrigin).toBe("anonymous");
+		});
+	});
+});

test/configCases/css/prefetch-preload-module/webpack.config.js

@@ -0,0 +1,24 @@
+/** @type {import("../../../../").Configuration} */
+module.exports = {
+	entry: "./index.mjs",
+	experiments: {
+		outputModule: true,
+		css: true
+	},
+	name: "esm",
+	target: "web",
+	output: {
+		publicPath: "",
+		module: true,
+		filename: "bundle0.mjs",
+		chunkFilename: "[name].mjs",
+		crossOriginLoading: "anonymous",
+		chunkFormat: "module"
+	},
+	performance: {
+		hints: false
+	},
+	optimization: {
+		minimize: false
+	}
+};

test/helpers/FakeDocument.js

@@ -197,16 +197,16 @@ class FakeSheet {
 				currentRule[property] = value;
 			}
 		};
-		let css = fs.readFileSync(
-			path.resolve(
-				this._basePath,
-				this._element.href
-					.replace(/^https:\/\/test\.cases\/path\//, "")
-					.replace(/^https:\/\/example\.com\/public\/path\//, "")
-					.replace(/^https:\/\/example\.com\//, "")
-			),
-			"utf-8"
-		);
+		const filepath = /file:\/\//.test(this._element.href)
+			? new URL(this._element.href)
+			: path.resolve(
+					this._basePath,
+					this._element.href
+						.replace(/^https:\/\/test\.cases\/path\//, "")
+						.replace(/^https:\/\/example\.com\/public\/path\//, "")
+						.replace(/^https:\/\/example\.com\//, "")
+				);
+		let css = fs.readFileSync(filepath, "utf-8");
 		css = css.replace(/@import url\("([^"]+)"\);/g, (match, url) => {
 			if (!/^https:\/\/test\.cases\/path\//.test(url)) {
 				return url;