const path = require('path');

module.exports = {
 entry: './src/index.js',    // 入口
 output: {       // 出口
 filename: 'bundle.js',    // 文件名
 path: path.resolve(__dirname, 'dist')  // 生成路径
 }
};

{
 "name": "webpack-demo",
 "version": "1.0.0",
 "description": "",
 "main": "index.js",
 "scripts": {
  "test": "echo \"Error: no test specified\" && exit 1",
+  "build": "webpack"       // 修改命令执行方法
 },
 "keywords": [],
 "author": "",
 "license": "ISC",
 "devDependencies": {
  "webpack": "^4.0.1",
  "webpack-cli": "^2.0.9",
  "lodash": "^4.17.5"
 }
 }

webpack-demo
|- package.json
|- webpack.config.js
|- /dist
 |- bundle.js
 |- index.html
|- /src
 |- index.js
|- /node_modules