Recognizes certain classes of webpack errors and cleans, aggregates and prioritizes them to provide a better Developer Experience

Downloads in past


2.0.16 years ago6 years agoMinified + gzip package size for friendly-errors-webpack4-plugin in KB


npm Build Status Build status
Friendly-errors-webpack-plugin recognizes certain classes of webpack errors and cleans, aggregates and prioritizes them to provide a better Developer Experience.
It is easy to add types of errors so if you would like to see more errors get handled, please open a PR!

Getting started


npm install friendly-errors-webpack-plugin --save-dev

Basic usage

Simply add FriendlyErrorsWebpackPlugin to the plugin section in your Webpack config.
var FriendlyErrorsWebpackPlugin = require('friendly-errors-webpack-plugin');

var webpackConfig = {
  // ...
  plugins: [
    new FriendlyErrorsWebpackPlugin(),
  // ...

Turn off errors

You need to turn off all error logging by setting your webpack config quiet option to true.
app.use(require('webpack-dev-middleware')(compiler, {
  quiet: true,
  publicPath: config.output.publicPath,

If you use the webpack-dev-server, there is a setting in webpack's ``devServer`` options:
// webpack config root
  // ...
  devServer: {
    // ...
    quiet: true,
    // ...
  // ...

If you use webpack-hot-middleware, that is done by setting the log option to false. You can do something sort of like this, depending upon your setup:
app.use(require('webpack-hot-middleware')(compiler, {
  log: false

Thanks to webpack-dashboard for this piece of info.


Build success


eslint-loader errors


babel-loader syntax errors


Module not found



You can pass options to the plugin:
new FriendlyErrorsPlugin({
  compilationSuccessInfo: {
    messages: ['You application is running here http://localhost:3000'],
    notes: ['Some additionnal notes to be displayed unpon successful compilation']
  onErrors: function (severity, errors) {
    // You can listen to errors transformed and prioritized by the plugin
    // severity can be 'error' or 'warning'
  // should the console be cleared between each compilation?
  // default is true
  clearConsole: true,

  // add formatters and transformers (see below)
  additionalFormatters: [],
  additionalTransformers: []

Adding desktop notifications

The plugin has no native support for desktop notifications but it is easy to add them thanks to node-notifier
for instance.
var NotifierPlugin = require('friendly-errors-webpack-plugin');
var notifier = require('node-notifier');
var ICON = path.join(__dirname, 'icon.png');

new NotifierPlugin({
    onErrors: (severity, errors) => {
      if (severity !== 'error') {
      const error = errors[0];
        title: "Webpack error",
        message: severity + ': ' +,
        subtitle: error.file || '',
        icon: ICON


Transformers and formatters

Webpack's errors processing, is done in four phases:
  1. Extract relevant info from webpack errors. This is done by the plugin here
  2. Apply transformers to all errors to identify and annotate well know errors and give them a priority
  3. Get only top priority error or top priority warnings if no errors are thrown
  4. Apply formatters to all annotated errors

You can add transformers and formatters. Please see transformErrors, and formatErrors in the source code and take a look a the default transformers and the default formatters.


  • x Make it compatible with node 4