fix: don't skip export generation for default reexport (#19463)

lib/library/ModuleLibraryPlugin.js

@@ -124,7 +124,7 @@ class ModuleLibraryPlugin extends AbstractLibraryPlugin {
 		{ options, compilation }
 	) {
 		const result = new ConcatSource(source);
-		const exportsInfos = options.export
+		const exportsInfo = options.export
 			? [
 					moduleGraph.getExportInfo(
 						module,
@@ -151,7 +151,7 @@ class ModuleLibraryPlugin extends AbstractLibraryPlugin {
 			? "const"
 			: "var";
 
-		for (const exportInfo of exportsInfos) {
+		for (const exportInfo of exportsInfo) {
 			if (!exportInfo.provided) continue;
 
 			let shouldContinue = false;
@@ -164,6 +164,7 @@ class ModuleLibraryPlugin extends AbstractLibraryPlugin {
 				for (const reexportInfo of exp.orderedExports) {
 					if (
 						reexportInfo.provided === false &&
+						reexportInfo.name !== "default" &&
 						reexportInfo.name === /** @type {string[]} */ (reexport.export)[0]
 					) {
 						shouldContinue = true;

test/configCases/library/module-reexport-external/webpack.config.js

@@ -5,7 +5,7 @@ module.exports = {
 	output: {
 		module: true,
 		library: {
-			type: "modern-module"
+			type: "module"
 		},
 		filename: "[name].js",
 		chunkFormat: "module"

test/configCases/library/module-reexport-type/global.d.ts

@@ -0,0 +1,4 @@
+declare module "*.png" {
+	const value: string;
+	export default value;
+}

test/configCases/library/module-reexport-type/index.ts

@@ -1,7 +1,15 @@
 import { value, T } from './re-export'
+import logo from './file.png';
 
-export { value, T }
+type MyType = string;
+
+export { logo, value, T, MyType }
 
 it("should not reexport type", function () {
 	expect(value).toBe(1)
 });
+
+type OtherMyType = string;
+
+export type { OtherMyType }
+export default MyType;

test/configCases/library/module-reexport-type/webpack.config.js

@@ -14,7 +14,7 @@ module.exports = {
 	output: {
 		module: true,
 		library: {
-			type: "modern-module"
+			type: "module"
 		},
 		chunkFormat: "module"
 	},
@@ -35,7 +35,24 @@ module.exports = {
 				options: {
 					transpileOnly: true
 				}
+			},
+			{
+				type: "asset/inline",
+				test: /\.png$/
 			}
 		]
-	}
+	},
+	plugins: [
+		function () {
+			const handler = compilation => {
+				compilation.hooks.afterProcessAssets.tap("testcase", assets => {
+					const source = assets["bundle0.mjs"].source();
+					expect(source).toContain(
+						"export { file_namespaceObject as logo, value };"
+					);
+				});
+			};
+			this.hooks.compilation.tap("testcase", handler);
+		}
+	]
 };