WEEK16：javascript进阶

  • 后台管理页面布局
    <!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <link rel="stylesheet" href="font-awesome-4.7.0/css/font-awesome.min.css">
    <style>
        body {
            margin:0;
            }
        .left{
            float: left;
        }
        .right{
            float: right;
        }
        .pg-header{
            height:48px;
            background-color:#2459a2;
            color:white;
            line-height: 48px;
            }
        .pg-header .logo{
            width: 200px;
            background-color: cadetblue;
            text-align: center;
        }
        .pg-header .icons{
            padding: 0 20px;
        }
        .pg-header .icons:hover{
            background-color: #204982;
        }
        .pg-header .user{
            /*width: 160px;*/
            /*background-color: wheat;*/
            color: white;
            height: 48px;
            margin-right: 60px;
            padding: 0 20px;
        }
        .pg-header .user:hover{
             background-color: #204982;
         }
        .pg-header .user .a img{
            height: 40px;
            width: 40px;
            margin-top: 4px;
            border-radius: 50%;
        }
        .pg-header .user .b{
             z-index: 20;
             position: absolute;
             top: 48px;
             right: 44px;
             background-color: white;
             color: black;
             width: 160px;
             display: none;
         }
        .pg-header .user:hover .b{
            display: block;
        }
        .pg-header .user .b a{
            display: block;
        }
        .pg-content .menu{
            position: absolute;
            top: 48px;
            left: 0;
            bottom: 0;
            width: 200px;
            background-color: #dddddd;
        }
        .pg-content .content{
            position: absolute;
            top: 48px;
            right: 0;
            bottom: 0;
            left: 200px;
            background-color: purple;
            min-width: 500px;
            /*修改下面的参数可以改变页面的格式*/
            overflow: auto;
            z-index: 9;
        }
    </style>
</head>
<body>
    <div class="pg-header">
        <div class="logo left">
            老男孩
        </div>

        <div class="user right" style="position: relative">
            <a class="a" href="#">
                <img src="1.jpg">
            </a>
            <div class="b">
                <a>我的资料</a>
                <a>注销</a>
            </div>
        </div>

        <div class="icons right">
            <i class="fa fa-commenting-o" aria-hidden="true"></i>
            <span>5</span>
        </div>
        <div class="icons right">
            <i class="fa fa-bell-o" aria-hidden="true"></i>
        </div>

    </div>
    <div class="pg-content">
        <div class="menu left">a</div>
        <div class="content left">
            <p>asdf</p><p>asdf</p><p>asdf</p><p>asdf</p><p>asdf</p><p>asdf</p>
            <p>asdf</p><p>asdf</p><p>asdf</p><p>asdf</p><p>asdf</p><p>asdf</p>
            <p>asdf</p><p>asdf</p><p>asdf</p><p>asdf</p><p>asdf</p><p>asdf</p>
            <p>asdf</p><p>asdf</p><p>asdf</p><p>asdf</p><p>asdf</p><p>asdf</p>
            <p>asdf</p><p>asdf</p><p>asdf</p><p>asdf</p><p>asdf</p><p>asdf</p>
            <p>asdf</p><p>asdf</p><p>asdf</p><p>asdf</p><p>asdf</p><p>asdf</p>
            <p>asdf</p><p>asdf</p><p>asdf</p><p>asdf</p><p>asdf</p><p>asdf</p>
            <p>asdf</p><p>asdf</p><p>asdf</p><p>asdf</p><p>asdf</p><p>asdf</p>
            <p>asdf</p><p>asdf</p><p>asdf</p><p>asdf</p><p>asdf</p><p>asdf</p>
        </div>
    </div>
    <div class="pg-footer"></div>
</body>
</html>

     

  • JavaScript词法分析解析
    活动对象（active object）简称AO
    • 分析过程(分析的先后顺序)
      • 形式参数
      • 局部变量
      • 函数声明表达式
    • 具体到下面代码的分析过程
      • 形式参数
        AO.age=undefined
        AO.age=3
      • 局部变量
        AO.age=undefined（=3）
      • 函数内声明表达式
        AO.age=function age(){}
        1     <script>
2         function t1(age) {
3             console.log(age);//function age() {}
4             var age=27;
5             console.log(age);//27
6             function age() {}
7             console.log(age);//27
8         }
9     </script>

         

posted @ 2019-10-21 22:44  飞琼君  阅读(74)  评论(0)    收藏  举报