vue2源码学习01配置rollup打包环境

1.下载rollup相关依赖

npm i rollup rollup-plugin-babel @babel/core @babel/preset-env --save-dev

2.新建rollup.config.js配置打包选项

//rollup可以导出一个对象，作为打包的配置文件
import babel from 'rollup-plugin-babel'
export default {input: './src/index.js',//入口output: {file: './dist/vue.js',//出口name: 'Vue',//global.Vueformat: 'umd',//esm es6 commonjs模块 iife自执行函数 umd统一模块规范(comon js & amd)sourcemap: true,//希望可以调试源代码},plugins: [babel({exclude: 'node_moudules/**'//排除依赖的模块})]
}

3.新建.babelrc文件配置babel

{"presets": ["@babel/preset-env"]
}

4.修改package.json文件，配置启动脚本 

{"name": "y","version": "1.0.0","description": "","main": "index.js","scripts": {"dev": "rollup -cw"},"author": "","license": "ISC","devDependencies": {"@babel/core": "^7.23.3","@babel/preset-env": "^7.23.3","rollup": "^2.79.1","rollup-plugin-babel": "^4.4.0"}
}

5.执行脚本后的目录结构