webpack最简单的打包命令 es6语法规范
sum.js

function sum(a,b){
    return a+b
}

app.js

 import sum from './sum.js'
 console.log(sum(12,22))   

打包命令

*webpack app.js bundle.js*

webpack打包支持common.js的规范
minus.js

module.exports function minus(a,b){
    return a-b
}

app.js

var minus = require('./minus.js')
console.log(minus(22,10))

webpack app.js bundle.js

webpack 对AMD语法的支持
multi.js

define(function(require, factory){
    return function(a,b){
        return a*b
    }
})

app.js

var multi=require(['./multi.js'])
console.log(multi(10,22))

webpack app.js bundle.js