githubmirror/webpack

examples/virtual-modules/webpack.config.js
120 строк3 KB
Xiao
feat: add the `context` option support for VirtualUrlPlugin (#20449)
12 мар 2026, 21:47
12 мар 2026, 21:47214f361
"use strict";

const fs = require("fs");
const path = require("path");
const webpack = require("../../");

const routesPath = path.join(__dirname, "./routes");

const VERSION = "1.0.0";

/** @type {(env: "development" | "production") => import("webpack").Configuration} */
const config = (env = "development") => ({
	mode: env,
	// Just for examples, you can use any target
	target: "node",
	module: {
		rules: [
			{
				test: /\.tsx?$/,
				loader: "ts-loader",
				options: {
					transpileOnly: true
				}
			},
			{
				test: /\.(svg|png)$/,
				type: "asset/resource",
				generator: {
					// Remove virtual: scheme from filename
					filename: (/** @type {{ filename: string }} */ pathData) =>
						pathData.filename.replace("virtual:", "")
				}
			}
		]
	},
	plugins: [
		new webpack.experiments.schemes.VirtualUrlPlugin(
			{
				"my-module": 'export const msg = "from virtual module"',
				"my-async-module": async () => {
					const value = await Promise.resolve("async-value");

					return `export default "${value}"`;
				},
				"build-info": {
					source() {
						return `export const version = "${VERSION}"`;
					},
					// Re-evaluate this value at each compilation, useful when getting a value from a variable
					version: true
				},
				"hello.ts": "export const hello = 'hello';",
				"my-json-modules": {
					type: ".json",
					source: () => '{"name": "virtual-url-plugin"}'
				},
				// Loaders will work with virtual modules
				"my-typescript-module": {
					type: ".ts",
					source: () => `
const value: string = "value-from-typescript";

export default value;`
				},
				routes: {
					source(
						/** @type {import("webpack").LoaderContext<unknown>} */ loaderContext
					) {
						// Use `loaderContext.addContextDependency` to monitor the addition or removal of subdirectories in routesPath to trigger the rebuilding of virtual modules.
						// See more - https://webpack.js.org/api/loaders/#the-loader-context
						loaderContext.addContextDependency(routesPath);

						const files = fs.readdirSync(routesPath);

						return `export const routes = {${files
							.map(
								(key) => `${key.split(".")[0]}: () => import('./routes/${key}')`
							)
							.join(",\n")}}`;
					}
				},
				"code-from-file": {
					async source(
						/** @type {import("webpack").LoaderContext<unknown>} */ loaderContext
					) {
						const pathToFile = path.resolve(__dirname, "./code.js");

						// Will trigger rebuild on changes in the file
						loaderContext.addDependency(pathToFile);

						const code = await fs.promises.readFile(pathToFile, "utf8");

						return code;
					}
				},
				"src/components/button.js":
					"import { trim } from './utils';export const button = trim('button ');",
				"logo.svg": {
					type: ".svg",
					source() {
						return '<svg xmlns="http://www.w3.org/2000/svg"><circle cx="50" cy="50" r="40"/></svg>';
					}
				}
			},
			{
				context: "auto"
			}
		),
		new webpack.experiments.schemes.VirtualUrlPlugin(
			{
				"my-module": `const msg = "from virtual module with custom scheme";

export default msg`
			},
			"my-custom-scheme"
		)
	]
});

module.exports = config;