1、mouseover与mouseenter
mouseover事件:不论鼠标指针穿过被选元素或其子元素,都会触发 mouseover 事件。
mouseenter事件:只有在鼠标指针穿过被选元素时,才会触发 mouseenter 事件。
简单写个例子:
- <!DOCTYPE html>
- <html lang="en">
- <head>
- <meta charset="UTF-8">
- <title>Document</title>
- <style>
- .over{
- background-color: #66d3ff;
- width:400px;
- float:left;
- padding: 10px 10px;
- }
- .enter{
- background-color: #66d3ff;
- width:400px;
- float:left;
- margin-left:30px;
- padding: 10px 10px;
- }
- h2{
- background-color: #fff;
- padding: 5px 5px;
- }
- </style>
- </head>
- <body>
- <p>mouseover 事件:不论鼠标指针穿过被选元素或其子元素,都会触发 mouseover 事件。</p>
- <p>mouseenter 事件:只有在鼠标指针穿过被选元素时,才会触发 mouseenter 事件。</p>
- <div class="over">
- <h2>被触发的 Mouseover 事件次数:<span></span></h2>
- </div>
- <div class="enter">
- <h2>被触发的 Mouseenter 事件次数:<span></span></h2>
- </div>
- <script>
- var x = 0,y = 0;
- var div1 = document.getElementsByClassName("over")[0];
- div1.addEventListener("mouseover",function(){
- var span = this.getElementsByTagName("span")[0];
- span.innerText = (x +=1);
- },false);
- var div2 = document.getElementsByClassName("enter")[0];
- div2.addEventListener("mouseenter",function(){
- var span = this.getElementsByTagName("span")[0];
- span.innerText = (y +=1);
- },false);
- </script>
- </body>
- </html>
2、mouseout与mouseleave
mouseout事件:不论鼠标指针离开被选元素还是任何子元素,都会触发 mouseout 事件。
mouseleave事件:只有在鼠标指针离开被选元素时,才会触发 mouseleave 事件。
简单写个例子:
- <!DOCTYPE html>
- <html lang="en">
- <head>
- <meta charset="UTF-8">
- <title>Document</title>
- <style>
- .over{
- background-color: #66d3ff;
- width:400px;
- float:left;
- padding: 10px 10px;
- }
- .enter{
- background-color: #66d3ff;
- width:400px;
- float:left;
- margin-left:30px;
- padding: 10px 10px;
- }
- h2{
- background-color: #fff;
- padding: 5px 5px;
- }
- </style>
- </head>
- <body>
- <p> mouseout事件:不论鼠标指针离开被选元素还是任何子元素,都会触发 mouseout 事件。</p>
- <p> mouseleave事件:只有在鼠标指针离开被选元素时,才会触发 mouseleave 事件。</p>
- <div class="over">
- <h2>被触发的 mouseout 事件次数:<span></span></h2>
- </div>
- <div class="enter">
- <h2>被触发的 mouseleave 事件次数:<span></span></h2>
- </div>
- <script>
- var x = 0,y = 0;
- var div1 = document.getElementsByClassName("over")[0];
- div1.addEventListener("mouseout",function(){
- var span = this.getElementsByTagName("span")[0];
- span.innerText = (x +=1);
- },false);
- var div2 = document.getElementsByClassName("enter")[0];
- div2.addEventListener("mouseleave",function(){
- var span = this.getElementsByTagName("span")[0];
- span.innerText = (y +=1);
- },false);
- </script>
- </body>
- </html>
转载
https://blog.csdn.net/u010297791/article/details/57412796