基础配置

一、安装webpack

初始化

yarn init -y

npm i webpack webpack-cli -S
or
yarn add webpack webpack-cli

index.js

var a = 10;
console.log(a);

1-3 webpack.config.js

const path = require("path");
module.exports = {
    entry: "./index.js",    //入口
    output: {                              //出口  打包到dist目录下
        filename: "bundle.js",
        path:path.join(__dirname,"dist")
    },
    mode:"development"
}

package.json

"scripts": {
    "build":"webpack --config webpack.config.js"
  }

打包

npm run build

npm start   //启动