Web Front-endJS TutorialNative JavaScript to implement the operation method of dom element class (graphic tutorial)Native JavaScript to implement the operation method of dom element class (graphic tutorial)
这篇文章主要介绍了原生JavaScript来实现对dom元素class的操作方法,提供了代码toggleClass的测试例子，具体操作步骤大家可查看下文的详细讲解，感兴趣的小伙伴们可以参考一下。
jQuery操作class的方式非常强大
写了一个利用原生js来实现对dom元素class的操作方法
1.addClass:为指定的dom元素添加样式
2.removeClass:删除指定dom元素的样式
3.toggleClass:如果存在(不存在)，就删除(添加)一个样式
4.hasClass:判断样式是否存在
下面为一toggleClass的测试例子
[html] view plain copy
<style type="text/css">
p.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> <p id = "test" style = "width:250px;height:100px;"> sssssssssssss </p> <input type = "button" value = "toggleClassTest" onclick = "toggleClassTest();" /> </body>
上面是我整理给大家的，希望今后会对大家有帮助。
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