webpack4.0打包

package.json

{
  "name": "web",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1",
    "start": "webpack"
  },
  "author": "",
  "license": "ISC",
  "devDependencies": {
    "html-webpack-plugin": "^3.2.0",
    "webpack": "^4.41.6",
    "webpack-cli": "^3.3.11",
    "webpack-dev-server": "^3.10.3"
  },
  "dependencies": {
    "eventemitter3": "^4.0.0",
    "jquery": "^3.4.1",
    "socket.io-client": "^2.3.0",
    "terser-webpack-plugin": "^2.3.5",
    "terser-webpack-plugin-legacy": "^1.2.3"
  }
}

webpack.config.js

const webpack = require('webpack'); //访问内置的插件
const path = require('path');
module.exports={
    entry:  './src/src/index.js',  
    output: {
        filename: 'index.js',
        path: path.resolve(__dirname, 'dist')
    }, 
    // optimization: {
    //     minimizer: [new TerserPlugin({
    //         cache: true,
    //         parallel: true,
    //     })],
    //   },

    mode: 'production', //模式 none
}