DOM之设置,获取,删除自定义的属性值

1.设置自定义的属性以及属性值

element.setAttribute("属性名", "属性值");

自定义属性 规定以 data- 开头作为属性名

2.获取自定义的属性值

element.getAttribute("属性名");

3.删除自定义的属性名

element.removeAttribute("属性名")

 

代码示例  

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  1 <!DOCTYPE html>
  2 <html lang="en">
  3 
  4 <head>
  5     <meta charset="UTF-8">
  6     <meta name="viewport" content="width=device-width, initial-scale=1.0">
  7     <title>Document</title>
  8 
  9     <style>
 10         .box {
 11             width: 350px;
 12             height: 300px;
 13             margin: 150px 300px
 14         }
 15 
 16         .box_title {
 17 
 18             width: 320px;
 19             height: 45px;
 20             text-align: center;
 21             line-height: 45px;
 22             margin-left: 10px;
 23 
 24         }
 25 
 26         .box_title div {
 27 
 28             float: left;
 29             width: 100px;
 30             border: 3px solid #999;
 31             
 32 
 33         }
 34 
 35         .current {
 36             background-color: red;
 37             font-size: 20px;
 38         }
 39 
 40         .box_content {
 41             height: 150px;
 42             width: 330px;
 43             border: 5px solid#999;
 44 
 45         }
 46 
 47         .box_content div {
 48 
 49             margin-top: 45px;
 50             margin-left: 35px;
 51             display: none;
 52             color: blue;
 53         }
 54         
 55     </style>
 56 </head>
 57 
 58 <body>
 59     <div class="box">
 60         <div class="box_title">
 61             <div class="current">早春</div>
 62             <div>江南春</div>
 63             <div>春游湖</div>
 64         </div>
 65         <br />
 66         <div class="box_content">
 67             <div style="display: block;">天街小雨润如酥,草色遥看近却无。<br /><br />
 68                 最是一年春好处,绝胜烟柳满皇都。</div>
 69             <div>千里莺啼绿映红,水村山郭酒旗风。<br /><br />
 70                 南朝四百八十寺,多少楼台烟雨中。</div>
 71             <div>双飞燕子几时回?夹岸桃花蘸水开。<br /><br />
 72                 春雨断桥人不渡,小舟撑出柳阴来。</div>
 73         </div>
 74     </div>
 75 
 76 
 77 
 78     <script>
 79         var divs = document.querySelector('.box_title').querySelectorAll('div');
 80 
 81         var content_divs = document.querySelector('.box_content').querySelectorAll('div');
 82 
 83         for (var i = 0; i < divs.length; i++) {
 84            
 85              //开始给每个div设置索引号,索引号从零开始
 86             divs[i].setAttribute('data-index', i);
 87 
 88             divs[i].onclick = function () {
 89                 //排它思想
 90                 for (var i = 0; i < divs.length; i++) {
 91                     divs[i].className = '';
 92                 }
 93                 this.className = 'current';
 94 
 95                 //获取上面的div 设置的索引号
 96                 var ide = this.getAttribute('data-index');
 97                 
 98                 
 99 
100                 for(var i=0;i<content_divs.length;i++){
101                     //排他思想
102                     content_divs[i].style.display = 'none';
103                 }
104                 content_divs[ide].style.display = 'block';
105             }
106 
107 
108             
109 
110         }
111     </script>
112 </body>
113 
114 </html>

 

 

 

 

 

posted @ 2020-04-26 15:42  瑾言**  阅读(373)  评论(0编辑  收藏  举报