webpack/lib/ModuleNotFoundError.js

Packs CommonJs/AMD modules for the browser. Allows to split your codebase into multiple bundles, which can be loaded on demand. Support loaders to preprocess files, i.e. json, jsx, es7, css, less, ... and your custom stuff.

/*
	MIT License http://www.opensource.org/licenses/mit-license.php
	Author Tobias Koppers @sokra
*/

"use strict";

const WebpackError = require("./WebpackError");

/** @typedef {import("./Dependency").DependencyLocation} DependencyLocation */
/** @typedef {import("./Module")} Module */

const previouslyPolyfilledBuiltinModules = {
	assert: "assert/",
	buffer: "buffer/",
	console: "console-browserify",
	constants: "constants-browserify",
	crypto: "crypto-browserify",
	domain: "domain-browser",
	events: "events/",
	http: "stream-http",
	https: "https-browserify",
	os: "os-browserify/browser",
	path: "path-browserify",
	punycode: "punycode/",
	process: "process/browser",
	querystring: "querystring-es3",
	stream: "stream-browserify",
	_stream_duplex: "readable-stream/duplex",
	_stream_passthrough: "readable-stream/passthrough",
	_stream_readable: "readable-stream/readable",
	_stream_transform: "readable-stream/transform",
	_stream_writable: "readable-stream/writable",
	string_decoder: "string_decoder/",
	sys: "util/",
	timers: "timers-browserify",
	tty: "tty-browserify",
	url: "url/",
	util: "util/",
	vm: "vm-browserify",
	zlib: "browserify-zlib"
};

class ModuleNotFoundError extends WebpackError {
	/**
	 * @param {Module} module module tied to dependency
	 * @param {Error&any} err error thrown
	 * @param {DependencyLocation} loc location of dependency
	 */
	constructor(module, err, loc) {
		let message = `Module not found: ${err.toString()}`;

		// TODO remove in webpack 6
		const match = err.message.match(/Can't resolve '([^']+)'/);
		if (match) {
			const request = match[1];
			const alias = previouslyPolyfilledBuiltinModules[request];
			if (alias) {
				const pathIndex = alias.indexOf("/");
				const dependency = pathIndex > 0 ? alias.slice(0, pathIndex) : alias;
				message +=
					"\n\n" +
					"BREAKING CHANGE: " +
					"webpack < 5 used to include polyfills for node.js core modules by default.\n" +
					"This is no longer the case. Verify if you need this module and configure a polyfill for it.\n\n";
				message +=
					"If you want to include a polyfill, you need to:\n" +
					`\t- add a fallback 'resolve.fallback: { "${request}": require.resolve("${alias}") }'\n` +
					`\t- install '${dependency}'\n`;
				message +=
					"If you don't want to include a polyfill, you can use an empty module like this:\n" +
					`\tresolve.fallback: { "${request}": false }`;
			}
		}

		super(message);

		this.name = "ModuleNotFoundError";
		this.details = err.details;
		this.module = module;
		this.error = err;
		this.loc = loc;
	}
}

module.exports = ModuleNotFoundError;