webpack.dev.config.js

const path = require('path');
const webpack = require('webpack');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const OpenBrowserPlugin = require('open-browser-webpack-plugin');

module.exports = {
  entry: "./src/index.js",
  output: {
    filename: "bundle.js",
    publicPath: '/'
  },
  devtool: "source-map",
  devServer: {
    compress: true,
    port: 3001,
    hot: true,
    historyApiFallback: true
    // contentBase: path.join(__dirname, "dist")
  },
  module: {
    rules: [
      { test: /\.js$/, exclude: /node_modules/, use: "babel-loader" },
      {
        test: /\.css$/,
        use: ["style-loader","css-loader","postcss-loader"]
      },
      { test: /\.(jpe?g|png)$/, use: 'file-loader?name=images/[name].[hash:8].[ext]' }
      // {
      //   test: require.resolve('jquery'),
      //   use: [{
      //     loader: 'expose-loader',
      //     options: '$'
      //   }]
      // }
    ]
  },
  plugins: [
    new webpack.HotModuleReplacementPlugin(),
    new HtmlWebpackPlugin({
      title: 'hello world',
      template: 'templete/index.html'
    }),
    new OpenBrowserPlugin({
      url: 'http://localhost:3000'
    })
  ]
}