webpack.config.dev.js

const webpack = require('webpack');
const merge = require('webpack-merge');
const common = require('./webpack.config.common');

module.exports = merge(common, {
  devtool: 'inline-source-map',
  devServer: {
    headers: {
      'Access-Control-Allow-Origin': '*',
      'Access-Control-Allow-Methods': 'GET,POST,PUT,DELETE,PATCH,OPTIONS',
      'Access-Control-Allow-Headers': 'content-type,authorization,accept',
    },
    port: 8181,
    inline: true,
    historyApiFallback: true,
    clientLogLevel: 'none',
    open: true,
    contentBase: 'dist',
  },
  plugins: [
    new webpack.HotModuleReplacementPlugin(),
    new webpack.DefinePlugin({
      'process.env': {
        NODE_ENV: JSON.stringify('development'),
      },
      __DEV__: true,
    }),
  ],
});