获取滚动条宽度代码(记录)

1.创建一个嵌套节点,让外层节点产生滚动条。

2.用offsetWidth - clientWidth   即可获得滚动条宽度。

为了避免页面抖动,可以设置外层元素position:absolute和visibility:hidden

代码如下:

 1 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
 2 <html xmlns="http://www.w3.org/1999/xhtml">
 3 <head>
 4 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
 5 <title>滚动条宽度</title>
 6 <script type="text/javascript">
 7 window.onload = function(){
 8     function getScrollWith(){ 
 9         var wrap = setAttributes(document.createElement('div'),{ 
10             style : { 
11             width : '200px', 
12             height: '200px',
13             overflow: 'auto', 
14             position:'absolute', 
15             visibility:'hidden' 
16             } 
17         });
18         
19         var inner = setAttributes(document.createElement('div'),{ 
20             style : { 
21             width : '100px', 
22             height: '2000px' 
23             } 
24         });
25         
26         document.body.appendChild(wrap); 
27         wrap.appendChild(inner); 
28         var w = wrap.offsetWidth - wrap.clientWidth; 
29         document.body.removeChild(wrap); 
30         wrap = null; 
31         inner = null; 
32         return w; 
33     }
34     //设置CSS样式
35     function setAttributes(elem,opts){ 
36         for(var key in opts){ 
37             if(typeof opts[key] == 'string'){ 
38                 elem[key] = opts[key]; 
39             }else{ 
40                 if(!elem[key]){ 
41                     elem[key] = {}; 
42                 } 
43                 setAttributes(elem[key],opts[key]); 
44             } 
45         } 
46         return elem; 
47     }
48     var a = getScrollWith();
49     alert(a);
50 }
51 </script>
52 </head>
53 
54 <body>
55 </body>
56 </html>
原文地址:https://www.cnblogs.com/laborc/p/3066893.html