ES6代码转换成ES5代码

桌面创建目录存放文件

mkdir es6Test 

进入创建目录

cd es6Test

初始化package.json

yarn init -y 
npm init -y
cnpm init -y

全局安装Babel-cli

cnpm install -g babel-cli

本地安装babel-preset-es2015 和 babel-cli

npm install --save-dev babel-preset-es2015 babel-cli
cnpm install --save-dev babel-preset-es2015 babel-cli
yarn add babel-preset-es2015 babel-cli -D

新建.babelrc

{
    "presets":[
        "es2015"
    ],
    "plugins":[]
}

在终端输入命令

babel src/index.js -o dist/index.js

修改package.json 简化命令

{
  "name": "es6Test",
  "version": "1.0.0",
  "description": "es6Test",
  "main": "index.js",
  "author": "davis",
  "license": "MIT",
  "scripts": {
    "build": "babel src/index.js -o dist/index.js",
    "sourcebuild": "babel src/index.js -o dist/index.js -s"
  },
  "dependencies": {
    "babel-cli": "^6.26.0",
    "global": "^4.4.0"
  },
  "devDependencies": {
    "babel-cli": "^6.26.0",
    "babel-preset-es2015": "^6.24.1"
  }
}

使用简化命令运行命令行打包生成文件

npm run build 
yarn build