By default, webpack will tolerate any errors happening while bundling.

It’s useful when you’re running in webpack-dev-server mode, however, when you’re making your final build you might want it to fail if any error happens (the main use case being when you’re testing the build step on your CI).

For that, you can use the bail configuration option.

Here is an example of a minimal webpack.config.js setup that will fail your Travis CI tests if any error happens at build time:

const plugins = [];
const TRAVIS = process.env.TRAVIS ? JSON.parse(process.env.TRAVIS) : false;

if (TRAVIS) {
  console.log('TRAVIS mode (will fail on error)');
  plugins.push(new webpack.NoErrorsPlugin());
}

const config = {
  bail: TRAVIS,
  // ... the rest of your config
};

module.exports = config;

Resources:

• bail configuration option
• implementation on topheman/react-es6-redux