一.require.js加载

<script src="js/require.js" defer async="true" data-main="js/main"></script>

注：anync="true"异步加载js，defer是ie支持的异步加载方式。

二.主模块的写法

/**
 * Created by zhanghaov on 2018/3/21.
 */
require.config({
    paths:{
        "jquery":"jquery-1.8.3",
        "math":"math"
    }
    //baseUrl: "js/lib" 可配置默认路径
});

require(['jquery','math'],function($,math){
    var result = math.add(5,10);

    console.log($(".box").html());
    console.log(result);

    $.toSay({
        name:'abc',
        age:213
    });
});

三.自定义模块（遵循AMD规范）

/**
 * Created by zhanghaov on 2018/3/21.
 */
//按照AMD规定，自定义模块 define()函数
define(['jquery'],function($){
    var add = function(x,y){
        return x + y;
    };

    var req = function(){
        $.ajax({
            url:'www.baidu.com',
            type:'POST',
            data:{
                name:'lee',
                age:'12'
            },
            success:function(data){

            }
        });
    }
    $.extend({
        toSay:function(options){
            var defaults = {
                name:'lee',
                age:14
            }

            var settings = $.extend(true,defaults,options);
            for(var i in settings){
                console.log(i + "==" +settings[i]);
            }
        }
    });

    return {
        add:add,
        req:req
    };

});