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ModuleNotFoundError.js
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Wed, Jul 2, 06:01

ModuleNotFoundError.js
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/*
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;
Error.captureStackTrace(this, this.constructor);
}
}
module.exports = ModuleNotFoundError;

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