简单使用webpack打包文件的实现

npm i -g webpack

export default {
  sum(...arg){
    let s=0;
    arg.forEach(item=>{
      s+=item;
    });
    return s
  }
}

import common from './mode1'

window.onload=function(){
  document.onclick=function(){
    alert(common.sum(12,43,65,8,7,98))
  }
}

const pathlib = require('path');
module.exports = {
  entry: {
    index:'./src/1',
    ym:'./src/2'
  },
  output: {
    path: pathlib.resolve('dest/'),
    filename: '[name].bundle.js'
  }
}