jquery的hover mouseover mouseout mouseenter mouseleave的区别

时间：2023-07-31 08:41:01

jquery的hover mouseover mouseout mouseenter mouseleave的区别

1.mouseover mouseout

mouseover - 鼠标指针经过任何子元素都会触发绑定在父元素上的mouseover事件

mouseout - 鼠标指针离开任何子元素时都会触发父元素上的mouseover事件

然后，你把代码拷贝过去try一下，就会有更深刻的理解；

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<head>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

<title>无标题文档</title>

<script src="http://libs.baidu.com/jquery/2.0.0/jquery.min.js"></script>

<script type="text/javascript">

  $(function (){

       var outer=$("#outer");

       outer.mouseover(function (){

           alert('outer mouseover');

       }).mouseout(function (){

            alert('outer mouseout');

       })

       //当子元素的over 和 out事件发生时，

       //事件会冒泡到父级，也就是说outer上的 over 和 out 会被触发

       var inner=$("#inner");

       inner.mouseover(function (){

             alert('inner mouseover');

       }).mouseout(function (){

              alert('inner mouseout');

       })

  })

</script>

<style type="text/css">

.outer{

    height:100px;

    width:20%;

    background-color:green;

    float:left;

    margin-left:25px;

}

.inner{

    height:50px;

    width:60%;

    margin:25px auto;

    background-color:red;

}

</style>

</head>

<body>

  <div id="outer" class="outer">

   <div id="inner" class="inner"></div>

  </div>

</body>

</html>

2.mouseenter mouseleave

mouseenter - 鼠标指针经过绑定的元素时触发事件，经过其子元素时，不会触发事件

mouseleave - 只有当鼠标离开绑定的元素时才会触发该事件

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<head>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

<title>无标题文档</title>

<script type="text/javascript" src="script/jquery-1.7.1.min.js"></script>

<script type="text/javascript">

    $(function (){

       var outer1=$("#outer1");

       outer1.mouseenter(function (){

           alert('outer1 mouseenter');

       }).mouseleave(function (){

            alert('outer1 mouseleave');

       })

       var inner1=$("#inner1");

       inner1.mouseenter(function (){

             alert('inner1 mouseenter');

       }).mouseleave(function (){

              alert('inner1 mouseleave');

       })

  })

</script>

<style type="text/css">

.outer{

    height:100px;

    width:20%;

    background-color:green;

    float:left;

    margin-left:25px;

}

.inner{

    height:50px;

    width:60%;

    margin:25px auto;

    background-color:red;

}

</style>

</head>

<body>

 <div id="outer1" class="outer">

    <div id="inner1" class="inner"></div>

  </div>

</body>

</html>

houver：

hover！= mouseover+mouseout

hover=mouseenter + mouseleave

  $(function (){

     //我们的hover是这样定义的;

    hover: function( fnOver, fnOut ) {

    return this.mouseenter( fnOver ).mouseleave( fnOut || fnOver );

     }

  })

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