关于webpack4的坑

今天本身测试的开发一个react应用,结果关于

var webpack = require('webpack');const path = require('path');module.exports = {  mode: 'development',  entry: path.join(__dirname,'./src/index.js'), //入口文件//   Entry: path.resolve(__dirname, '../src/app.js'),//   {//      path:  path.resolve(__dirname, '../src/app.js')//   },  output: {      path: __dirname + '/build',      filename: "bundle.js"  },  module: {      rules: [{          test: /\.js$/,          exclude: /node_modules/,          loader: 'babel-loader',          query: {              plugins: ['transform-runtime'],              presets: ['es2015', 'react', 'stage-2']          }      }, {          test: /\.css$/,          loader: "style-loader!css-loader"      }]  },  resolve: {    extensions: ['.js', '.jsx']  }};复制代码

关于默认是src/index.js,你要是设置src/app.js的话会报错

ERROR in Entry module not found: Error: Can't resolve './src' in 'e:\我的测试\reactdemo'