1.安装babel依赖
npm install --save-dev @babel/core @babel/cli @babel/preset-env npm install --save @babel/polyfill
2.用node初始化一个项目
node init -y
初始化后的package.json长这样
{
"name": "learn2",
"version": "1.0.0",
"description": "",
"main": "index.js",
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1"
},
"keywords": [],
"author": "",
"license": "ISC"
}
在package.json中增加scripts命令
{
"name": "learn2",
"version": "1.0.0",
"description": "",
"main": "index.js",
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1",
"build": "babel src -d dest"
},
"keywords": [],
"author": "",
"license": "ISC"
}
3.配置 babel.config.js
const presets = [
[
"@babel/env",
{
targets: {
edge: "9",
firefox: "60",
chrome: "67",
safari: "11.1",
},
useBuiltIns: "usage",
},
],
];
module.exports = { presets };
4.运行
npm run build
原文：https://www.cnblogs.com/413xiaol/p/11135479.html