標籤：軟體測試 ntb remove 測試 document rem text java code
jQuery操作class的方式非常強大，但是目前還有一些人不知道如何使用或者由於項目統一性的原因無法使用jquery.
在此寫了一個利用原生js來實現對dom元素class的操作方法
1.addClass:為指定的dom元素添加樣式
2.removeClass:刪除指定dom元素的樣式
3.toggleClass:如果存在(不存在)，就刪除(添加)一個樣式
4.hasClass:判斷樣式是否存在
下面為一toggleClass的測試例子
<style type="text/css"> div.testClass{ background-color:gray; } </style> <script type="text/javascript"> function hasClass(obj, cls) { return obj.className.match(new RegExp(‘(\\s|^)‘ + cls + ‘(\\s|$)‘)); } function addClass(obj, cls) { if (!this.hasClass(obj, cls)) obj.className += " " + cls; } function removeClass(obj, cls) { if (hasClass(obj, cls)) { var reg = new RegExp(‘(\\s|^)‘ + cls + ‘(\\s|$)‘); obj.className = obj.className.replace(reg, ‘ ‘); } } function toggleClass(obj,cls){ if(hasClass(obj,cls)){ removeClass(obj, cls); }else{ addClass(obj, cls); } } function toggleClassTest(){ var obj = document. getElementById(‘test‘); toggleClass(obj,"testClass"); } </script> <body> <div id = "test" style = "width:250px;height:100px;"> sssssssssssss </div> <input type = "button" value = "toggleClassTest" onclick = "toggleClassTest();" /> </body>
原生JS實現addClass,removeClass,toggleClass
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