开发环境配置

./config/webpack.dev.js

const webpack = require('webpack')const path = require('path')
const devConfig = {    devtool: 'eval-cheap-module-source-map',    mode: 'development',    devServer: {        contentBase: path.resolve(__dirname, '../public'),        hot: true,         historyApiFallback: true,         publicPath: '/',        port: 9901    },    plugins: [new webpack.HotModuleReplacementPlugin()]}
module.exports = devConfig