响应式树形菜单导航，jq+ajax

效果图：(仅为笔记，还有部分文件未上传)

 html:(id为dh中的内容实际为空,如果不用ajax请求数据的话)

<div class="collapse navbar-collapse" id="navbar-menu">
                        <ul class="nav navbar-nav navbar-right" data-in="fadeInDown" data-out="fadeOutUp" id="dh">
                            <li class="active">
                                <a href="#">首页</a>
                            </li>
                            <li>
                                <a href="#">1</a>
                            </li>
                            <li class="dropdown">
                                <a href="#" class="dropdown-toggle" data-toggle="dropdown">多级菜单</a>
                                <ul class="dropdown-menu">
                                    <li>
                                        <a href="#">1</a>
                                    </li>
                                    <li>
                                        <a href="#">2</a>
                                    </li>
                                    <li class="dropdown">
                                        <a href="#" class="dropdown-toggle" data-toggle="dropdown">Sub Menu</a>
                                        <ul class="dropdown-menu">
                                            <li>
                                                <a href="#">Custom Menu</a>
                                            </li>
                                            <li class="dropdown">
                                                <a href="#" class="dropdown-toggle" data-toggle="dropdown">Sub Menu</a>
                                                <ul class="dropdown-menu">
                                                    <li>
                                                        <a href="#">Custom Menu</a>
                                                    </li>
                                                    <li>
                                                        <a href="#">Custom Menu</a>
                                                    </li>
                                                    <li>
                                                        <a href="#">Custom Menu</a>
                                                    </li>
                                                    <li>
                                                        <a href="#">Custom Menu</a>
                                                    </li>
                                                </ul>
                                            </li>
                                            <li>
                                                <a href="#">Custom Menu</a>
                                            </li>
                                        </ul>
                                    </li>

                                    <li>
                                        <a href="#">Custom Menu</a>
                                    </li>
                                    <li>
                                        <a href="#">Custom Menu</a>
                                    </li>
                                </ul>
                            </li>
                            <li>
                                <a href="#">Portfolio</a>
                            </li>
                            <li>
                                <a href="#">Contact Us</a>
                            </li>
                            <li class="dropdown">
                                <a href="#" class="dropdown-toggle" data-toggle="dropdown">test</a>
                                <ul class="dropdown-menu">
                                    <li class="dropdown">
                                        <a href="#" class="dropdown-toggle" data-toggle="dropdown">1</a>
                                        <ul class="dropdown-menu">
                                            <li>
                                                <a href="#">5</a>
                                            </li>
                                        </ul>
                                    </li>
                                    <li>
                                        <a href="#">2</a>
                                    </li>
                                    
                                </ul>
                            </li>
                        </ul>
                    </div>

css:

/*
Typography
=========================== */
/*html,body {
    100%;
    height: auto;
    margin:0;
    padding:0;
    overflow-x: hidden;
}

body {
    font-family: 'Open Sans', sans-serif;
    position: relative;
    font-size:14px;
    line-height:24px;
    color:#6f6f6f;
}*/

a{
    color: #6f6f6f;
}

a,
a:active,
a:focus,
a:hover{
    outline:none;
    -webkit-transition: all 0.3s ease-in-out;
    -moz-transition: all 0.3s ease-in-out;
    -o-transition: all 0.3s ease-in-out;
    -ms-transition: all 0.3s ease-in-out;
    transition: all 0.3s ease-in-out;
}

a:hover{
    text-decoration:underline;
}

h1, h2, h3, h4, h5, h6{
    color:#3f3f3f;
    margin:0 0 15px 0;
    letter-spacing: 1px;
    font-weight: bold;
}

h1{
    font-size:48px;
    line-height:52px;
}

h2{
    font-size:36px;
    line-height:48px;
}

h3{
    font-size:30px;
    line-height:36px;
}

h4{
    font-size:24px;
    line-height:30px;
}

h5{
    font-size:18px;
    line-height:24px;
}

h6{
    font-size:14px;
    line-height:18px;
}

p{
    margin-bottom:20px;
}

section{
    padding: 70px 0;
    position: relative;
}
header{
    position: fixed;
    top: 0;
     100%;
    left: 0;
    z-index: 999;
}

/*
Navbar Adjusment
=========================== */
/* Navbar Atribute ------*/
.attr-nav > ul > li > a{
    padding: 28px 15px;
}

ul.cart-list > li.total > .btn{
    border-bottom: solid 1px #cfcfcf !important;
    color: #fff !important;
    padding: 10px 15px;
}

@media (min- 1024px) {
    /* Navbar General ------*/
    nav.navbar ul.nav > li > a{
        padding: 30px 15px;
        font-weight: 600;
    }
    
    nav.navbar .navbar-brand{
        margin-top: 0;
    }
    
    nav.navbar .navbar-brand img.logo{
         50px;
    }

    nav.navbar .navbar-brand{
        margin-top: 0;
    }
    
    nav.navbar .navbar-brand img.logo{
         50px;
    }
    
    nav.navbar li.dropdown ul.dropdown-menu{
        border-top: solid 5px;
    }
    
    /* Navbar Center ------*/
    nav.navbar-center .navbar-brand{
        margin: 0 !important;
    }
    
    /* Navbar Brand Top ------*/
    nav.navbar-brand-top .navbar-brand{
        margin: 10px !important;
    }
    
    /* Navbar Full ------*/
    nav.navbar-full .navbar-brand{
        position: relative;
        top: -15px;
    }
    
    /* Navbar Sidebar ------*/
    nav.navbar-sidebar ul.nav,
    nav.navbar-sidebar .navbar-brand{
        margin-bottom: 50px;
    }
    
    nav.navbar-sidebar ul.nav > li > a{
        padding: 10px 15px;
        font-weight: bold;
    }
    
    /* Navbar Transparent & Fixed ------*/
    nav.navbar.bootsnav.navbar-transparent.white{
        background-color: rgba(255,255,255,0.3);
        border-bottom: solid 1px #bbb;
    }
    
    nav.navbar.navbar-inverse.bootsnav.navbar-transparent.dark,
    nav.navbar.bootsnav.navbar-transparent.dark{
        background-color: rgba(0,0,0,0.3);
        border-bottom: solid 1px #555;
    }
    
    nav.navbar.bootsnav.navbar-transparent.white .attr-nav{
        border-left: solid 1px #bbb;
    }
    
    nav.navbar.navbar-inverse.bootsnav.navbar-transparent.dark .attr-nav,
    nav.navbar.bootsnav.navbar-transparent.dark .attr-nav{
        border-left: solid 1px #555;
    }
    
    nav.navbar.bootsnav.no-background.white .attr-nav > ul > li > a,
    nav.navbar.bootsnav.navbar-transparent.white .attr-nav > ul > li > a,
    nav.navbar.bootsnav.navbar-transparent.white ul.nav > li > a,
    nav.navbar.bootsnav.no-background.white ul.nav > li > a{
        color: #fff;
    }
    
    nav.navbar.bootsnav.navbar-transparent.dark .attr-nav > ul > li > a,
    nav.navbar.bootsnav.navbar-transparent.dark ul.nav > li > a{
        color: #eee;
    }
}

@media (max- 992px) {
    /* Navbar General ------*/
    nav.navbar .navbar-brand{
        margin-top: 0;
        position: relative;
        top: -2px;
    }
    
    nav.navbar .navbar-brand img.logo{
         30px;
    }
    
    .attr-nav > ul > li > a{
        padding: 16px 15px 15px;
    }
    
    /* Navbar Mobile slide ------*/
    nav.navbar.navbar-mobile ul.nav > li > a{
        padding: 15px 15px;
    }
    
    nav.navbar.navbar-mobile ul.nav ul.dropdown-menu > li > a{
        padding-right: 15px !important;
        padding-top: 15px !important;
        padding-bottom: 15px !important;
    }
    
    nav.navbar.navbar-mobile ul.nav ul.dropdown-menu .col-menu .title{
        padding-right: 30px !important;
        padding-top: 13px !important;
        padding-bottom: 13px !important;
    }
    
    nav.navbar.navbar-mobile ul.nav ul.dropdown-menu .col-menu ul.menu-col li a{
        padding-top: 13px !important;
        padding-bottom: 13px !important;
    }
    
    /* Navbar Full ------*/
     nav.navbar-full .navbar-brand{
        top: 0;
        padding-top: 10px;
    }
}

/* Navbar Inverse
=================================*/
nav.navbar.navbar-inverse{
    background-color: #222;
    border-bottom: solid 1px #303030;
}

nav.navbar.navbar-inverse ul.cart-list > li.total > .btn{
    border-bottom: solid 1px #222 !important;
}

nav.navbar.navbar-inverse ul.cart-list > li.total .pull-right{
    color: #fff;
}

nav.navbar.navbar-inverse.megamenu ul.dropdown-menu.megamenu-content .content ul.menu-col li a,
nav.navbar.navbar-inverse ul.nav > li > a{
    color: #eee;
}

nav.navbar.navbar-inverse ul.nav > li.dropdown > a{
    background-color: #222;
}

nav.navbar.navbar-inverse li.dropdown ul.dropdown-menu > li > a{
    color: #999;
}

nav.navbar.navbar-inverse ul.nav .dropdown-menu h1,
nav.navbar.navbar-inverse ul.nav .dropdown-menu h2,
nav.navbar.navbar-inverse ul.nav .dropdown-menu h3,
nav.navbar.navbar-inverse ul.nav .dropdown-menu h4,
nav.navbar.navbar-inverse ul.nav .dropdown-menu h5,
nav.navbar.navbar-inverse ul.nav .dropdown-menu h6{
    color: #fff;
}

nav.navbar.navbar-inverse .form-control{
    background-color: #333;
    border-color: #303030;
    color: #fff;
}

nav.navbar.navbar-inverse .attr-nav > ul > li > a{
    color: #eee;
}

nav.navbar.navbar-inverse .attr-nav > ul > li.dropdown ul.dropdown-menu{
    background-color: #222;
    border-left: solid 1px #303030;
    border-bottom: solid 1px #303030;
    border-right: solid 1px #303030;
}

nav.navbar.navbar-inverse ul.cart-list > li{
    border-bottom: solid 1px #303030;
    color: #eee;
}

nav.navbar.navbar-inverse ul.cart-list > li img{
    border: solid 1px #303030;
}

nav.navbar.navbar-inverse ul.cart-list > li.total{
    background-color: #333;
}

nav.navbar.navbar-inverse .share ul > li > a{
    background-color: #555;
}

nav.navbar.navbar-inverse .dropdown-tabs .tab-menu{
    border-right: solid 1px #303030;
}

nav.navbar.navbar-inverse .dropdown-tabs .tab-menu > ul > li > a{
    border-bottom: solid 1px #303030;
}

nav.navbar.navbar-inverse .dropdown-tabs .tab-content{
    border-left: solid 1px #303030;
}

nav.navbar.navbar-inverse .dropdown-tabs .tab-menu > ul > li > a:hover,
nav.navbar.navbar-inverse .dropdown-tabs .tab-menu > ul > li > a:focus,
nav.navbar.navbar-inverse .dropdown-tabs .tab-menu > ul > li.active > a{
    background-color: #333 !important;
}

nav.navbar-inverse.navbar-full ul.nav > li > a{
    border:none;
}

nav.navbar-inverse.navbar-full .navbar-collapse .wrap-full-menu{
    background-color: #222;
}

nav.navbar-inverse.navbar-full .navbar-toggle{
    background-color: #222 !important;
    color: #6f6f6f;
}

@media (min- 1024px) {
    nav.navbar.navbar-inverse ul.nav .dropdown-menu{
        background-color: #222 !important;
        border-left: solid 1px #303030 !important;
        border-bottom: solid 1px #303030 !important;
        border-right: solid 1px #303030 !important;
    }

    nav.navbar.navbar-inverse li.dropdown ul.dropdown-menu > li > a{
        border-bottom: solid 1px #303030;
    }
    
    nav.navbar.navbar-inverse ul.dropdown-menu.megamenu-content .col-menu{
        border-left: solid 1px #303030;
        border-right: solid 1px #303030;
    }
    
    nav.navbar.navbar-inverse.navbar-transparent.dark{
        background-color: rgba(0,0,0,0.3);
        border-bottom: solid 1px #999;
    }
    
    nav.navbar.navbar-inverse.navbar-transparent.dark .attr-nav{
        border-left: solid 1px #999;
    }
    
    nav.navbar.navbar-inverse.no-background.white .attr-nav > ul > li > a,
    nav.navbar.navbar-inverse.navbar-transparent.dark .attr-nav > ul > li > a,
    nav.navbar.navbar-inverse.navbar-transparent.dark ul.nav > li > a,
    nav.navbar.navbar-inverse.no-background.white ul.nav > li > a{
        color: #fff;
    }
    
    nav.navbar.navbar-inverse.no-background.dark .attr-nav > ul > li > a,
    nav.navbar.navbar-inverse.no-background.dark .attr-nav > ul > li > a,
    nav.navbar.navbar-inverse.no-background.dark ul.nav > li > a,
    nav.navbar.navbar-inverse.no-background.dark ul.nav > li > a{
        color: #3f3f3f;
    }
}
@media (max- 992px)  {
    nav.navbar.navbar-inverse .navbar-toggle{
        color: #eee;
        background-color: #222 !important;
    }
    
    nav.navbar.navbar-inverse .navbar-nav > li > a{
        border-top: solid 1px #303030;
        border-bottom: solid 1px #303030;
    }
    
    nav.navbar.navbar-inverse ul.nav li.dropdown ul.dropdown-menu  > li > a{
        color: #999;
        border-bottom: solid 1px #303030;
    }
    
    nav.navbar.navbar-inverse .dropdown .megamenu-content .col-menu .title{
        border-bottom: solid 1px #303030;
        color: #eee;
    }
    
    nav.navbar.navbar-inverse .dropdown .megamenu-content .col-menu ul > li > a{
        border-bottom: solid 1px #303030;
        color: #999 !important;
    }
    
    nav.navbar.navbar-inverse .dropdown .megamenu-content .col-menu.on:last-child .title{
        border-bottom: solid 1px #303030;
    }
    
    nav.navbar.navbar-inverse .dropdown-tabs .tab-menu > ul{
        border-top: solid 1px #303030;
    }
    
    nav.navbar.navbar-inverse.navbar-mobile .navbar-collapse{
        background-color: #222;
    }
}

@media (max- 767px)  {
    nav.navbar.navbar-inverse.navbar-mobile ul.nav{
        border-top: solid 1px #222;
    }
}

/*
Color
=========================== */
nav.navbar.bootsnav ul.dropdown-menu.megamenu-content .content ul.menu-col li a:hover,
.side .widget ul.link li a:hover,
.side .widget ul.link li a:focus,
.check-list li:before,
ul.cart-list > li > h6 > a,
.attr-nav > ul > li > a:hover,
.attr-nav > ul > li > a:focus,
nav.navbar-sidebar ul.nav li.dropdown.on > a,
nav.navbar-sidebar .dropdown .megamenu-content .col-menu.on .title,
nav.navbar-sidebar ul.nav li.dropdown ul.dropdown-menu li a:hover,
nav.navbar ul.nav li.dropdown.on > a,
nav.navbar.navbar-inverse ul.nav li.dropdown.on > a,
nav.navbar-sidebar ul.nav li.dropdown.on ul.dropdown-menu li.dropdown.on > a,
nav.navbar .dropdown .megamenu-content .col-menu.on .title,
nav.navbar ul.nav > li > a:hover,
nav.navbar ul.nav > li.active > a:hover,
nav.navbar ul.nav li.active > a,
nav.navbar li.dropdown ul.dropdown-menu > li a:hover{
    color: #f43438;
}

nav.navbar.navbar-transparent ul.nav > li > a:hover,
nav.navbar.no-background ul.nav > li > a:hover,
nav.navbar ul.nav li.scroll.active > a,
nav.navbar.navbar-dark ul.nav li.dropdown ul.dropdown-menu  > li > a:hover,
nav.navbar ul.nav li.dropdown.on > a,
nav.navbar-dark ul.nav li.dropdown.on > a{
    color: #f43438 !important;
}

@media(max-920px){
    nav.navbar .dropdown .megamenu-content .col-menu ul > li > a:hover,
    nav.navbar.navbar-dark .dropdown .megamenu-content .col-menu .title:hover{
        color: #f43438 !important;
    }
}

/*
Border
=========================== */
ul.cart-list > li.total > .btn{
    border-color: #f43438;
}

nav.navbar li.dropdown ul.dropdown-menu{
    border-top-color: #f43438 !important;
}

/*
Background
=========================== */
ul.cart-list > li.total > .btn,
.attr-nav > ul > li > a span.badge,
nav.navbar .share ul > li > a:hover,
nav.navbar .share ul > li > a:focus{
    background-color: #f43438;
}

ul.cart-list > li.total > .btn:hover,
ul.cart-list > li.total > .btn:focus{
    background-color: #dc3236 !important;
}

js:

this.xty = this.xty || {};
let node = ''
var ajaxMethods = new xty.ajaxMethods();
(function() {
    var sy = function() {
        this.init();
    };
    var p = sy.prototype;
    //执行this方法；
    p.init = function() {
        this.initData();
        this.getNav()
    };
    p.initData = function() {
        var _this = this;
    }
    //导航接口数据
    p.getNav = function() {
        var params = {
            siteId: '1'
        }
        ajaxMethods.ajaxDemo('/public/cms/category/list', function(json) {
            console.log(json, "js")
            if(json.code == "200") {
                var data = json.categorys;
                let a=p.initTree(data,1)
//                console.log(a,"aaa")
//                a+''
                 $("#dh").html(a)
            } else {
                console.log('kkk')
            }
        }, params);
    }
    p.initTree = function(data, type) {
        if(data.length > 0) {
            for(var i = 0; i < data.length; i++) {
                //如果有孩子
                if(data[i].children) {
                    console.log(3)
                    node+='<li class="dropdown"><a href="'+data[i].path+'" class="dropdown-toggle" data-toggle="dropdown">'+data[i].label+ '</a><ul class="dropdown-menu">' 
                    p.initTree(data[i].children, 2);
                }else{
                    //关键是这个type,来决定是第一回还是第n回调用后面多加上<ul><li>这个标签
                    if(type=='1'){
                        node += '<li><a href="'+data[i].path+ '">'+data[i].label+'</a></li>'
                    }else{
                        node += '<li><a href="'+data[i].path+ '">'+data[i].label+'</a></li></ul></li>'
                    }
                    
                }
                
            }
            
        }
        return node
    }
    xty.sy = sy;
})();