ES学习笔记(1)--环境搭建

目录结构

index.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <script src="./dist/index.js"></script>
</head>
<body>
    
</body>
</html>

src/index.js

let a = 1;
console.log(a);

安装依赖

npm init -y
cnpm install -g babel-cli
cnpm install --save-dev babel-preset-es2015 babel-cli

新建.babelrc

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

运行转化

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

dist/index.js

"use strict";

var a = 1;
console.log(a);

运行index.html

简化打包命令//package.json

  "scripts": {
    "build": "babel src/index.js -o dist/index.js"
  },

直接运行

npm run build

ES学习笔记(1)--环境搭建

目录结构

index.html

src/index.js

安装依赖

新建.babelrc

运行转化

dist/index.js

运行index.html

简化打包命令//package.json

渣渣辉

引用和评论

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