WEBPACK基本配置

1.cnpm install webpack babel-loader -D

2.配置webpack.config.js,配置如下;

module.exports = {
    entry:'./src/index.js',//入口文件
    output:{
        path:__dirname,//获取当前目录
        filename:'./build/bundle.js'//创建build文件夹和budle.js文件
    },
    module:{
        rules:[{  //模块验证规则
         test:/.js?$/,  //以js结尾
            exclude:/(node_modules)/,  //忽略第三方插件
            loader:'babel-loader'   //编译器选择
        }]
    }
}

3.配置package.json如下

{
  "name": "es6",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "start": "webpack",
    "test": "echo "Error: no test specified" && exit 1"
  },
  "author": "",
  "license": "ISC",
  "devDependencies": {
    "babel-core": "^6.26.3",
    "babel-loader": "^7.1.5",
    "babel-preset-es2015": "^6.24.1",
    "babel-preset-latest": "^6.24.1",
    "webpack": "^4.16.3"
  }
}

4.运行npm start