## 第1节 模块化 ### 1.第一种 ~~~ common.js export var a =10; index.js import {a} from "./common" ~~~ ### 2.第二种 ~~~ common.js var a =10; var b = 20; export { a, b } index.js import {a,b} from "./common" ~~~ ### 3.第三种引 ~~~ common.js var a =10; var b = 20; export default{ a, b } ~~~ index.js ~~~ import common from "./common" console.log(common.a); console.log(common.b); ~~~ 4. 第四种 ~~~ var imgUrl=[ {src:"/images/banner01.png"}, {src:"/images/banner02.png"}, {src:"/images/banner03.png"}, {src:"/images/banner04.png"} ]; module.exports={ imgUrl:imgUrl }; ~~~ 使用 ~~~ var local = require("../data/local.js"); ~~~