mastodon/config/webpack/development.js

// Note: You must restart bin/webpack-dev-server for changes to take effect

const merge = require('webpack-merge');
const sharedConfig = require('./shared.js');
const { settings, output } = require('./configuration.js');

const watchOptions = {
  ignored: /node_modules/,
};

if (process.env.VAGRANT) {
  // If we are in Vagrant, we can't rely on inotify to update us with changed
  // files, so we must poll instead. Here, we poll every second to see if
  // anything has changed.
  watchOptions.poll = 1000;
}

module.exports = merge(sharedConfig, {
  mode: 'development',

  devtool: 'cheap-module-eval-source-map',

  stats: {
    errorDetails: true,
  },

  output: {
    pathinfo: true,
  },

  devServer: {
    clientLogLevel: 'none',
    https: settings.dev_server.https,
    host: settings.dev_server.host,
    port: settings.dev_server.port,
    contentBase: output.path,
    publicPath: output.publicPath,
    compress: true,
    headers: { 'Access-Control-Allow-Origin': '*' },
    historyApiFallback: true,
    disableHostCheck: true,
    watchOptions: watchOptions,
  },
});