模块化

一、CommonJS

method.js

let sum = (a,b)=>a+b;
function myFun(a){
    return a;
}
module.exports = {
    sum,
    myFun
};

hello.js

let method = require("./method.js");
console.log(method.myFun(1));
console.log(method.sum(1,2));

二、ES6

注：由于可能不支持ES6语法，所以需要事先
下载babel
npm install -g babel-cli
# .babelrc

{
    "presets":["es2015"],
    "plugins":[]
}

"dev":"babel src -d dist"
npm run dev
运行时运行dist目录下的对应文件

1.普通型

userApi.js

export function mul(a,b){
    return a*b;
}
export function sayBye(){
    console.log("ByeBye!");
}

use.js

import {mul,sayBye} from './userApi';
sayBye();

2.日用型

userApi.js

export default{
    mul(a,b){
        return a*b;
    },
    sayBye(){
        console.log("ByeBye!");
    }
}

use.js

import user from './userApi';
user.sayBye();