jquery报告悬停在哪个元素上_Jquery_Hover_Nodename

jquery报告悬停在哪个元素上

jquery

jquery报告悬停在哪个元素上,jquery,hover,nodename,Jquery,Hover,Nodename,我正在尝试构建一个迷你检查器工具，它只报告悬停在上面的元素、它的ID和它拥有的任何类 <head> <meta charset="utf-8"> <title>Element Hover</title> <style> html {margin:0; padding:40px 20px 0; background:#333; font:0.9em/1.1em

我正在尝试构建一个迷你检查器工具，它只报告悬停在上面的元素、它的ID和它拥有的任何类

<head>

    <meta charset="utf-8">

    <title>Element Hover</title>

    <style>

        html                {margin:0; padding:40px 20px 0; background:#333; font:0.9em/1.1em "Arial", sans-serif}
        body                {margin:0; padding:0 0 10px; background:#555}

        #outerContainer     {margin:20px; padding:0; background:#777; width:240px; height:260px;}
        #innerContainer     {margin:20px; padding:0; background:#999; width:200px; height:200px;}

        p#info              {position:absolute; top:0; left:0}
        p                   {margin:0; padding:0; color:white}

    </style>

</head>

<body>

    <p id="info">Current element: <span></span></p>

    <p>Body</p>

    <div id="outerContainer">
        <p>Outer</p>

        <div id="innerContainer">
            <p>Inner</p>
        </div>

    </div>

    <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.0/jquery.min.js"></script>

    <script>

        //Initialise
        var nodeName = '';
        var ids = '';
        var classes = '';

        $('*').hover(function(e)
        {
            //Clear
            nodeName = '';
            ids = '';
            classes = '';

            nodeName = $(this).context.nodeName.toLowerCase();

            if ($(this).attr('id') != undefined)
            {
                ids = ' #' + $(this).attr('id');
            }

            if ($(this).attr('class') != undefined)
            {
                classes = ' .' + $(this).attr('class');
            }

            $('p#info span').text(nodeName+ids+classes)
        })
    </script>

</body>

我构建了一个包含4个嵌套元素的演示页面： html>正文>外部容器>内部容器

<head>

    <meta charset="utf-8">

    <title>Element Hover</title>

    <style>

        html                {margin:0; padding:40px 20px 0; background:#333; font:0.9em/1.1em "Arial", sans-serif}
        body                {margin:0; padding:0 0 10px; background:#555}

        #outerContainer     {margin:20px; padding:0; background:#777; width:240px; height:260px;}
        #innerContainer     {margin:20px; padding:0; background:#999; width:200px; height:200px;}

        p#info              {position:absolute; top:0; left:0}
        p                   {margin:0; padding:0; color:white}

    </style>

</head>

<body>

    <p id="info">Current element: <span></span></p>

    <p>Body</p>

    <div id="outerContainer">
        <p>Outer</p>

        <div id="innerContainer">
            <p>Inner</p>
        </div>

    </div>

    <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.0/jquery.min.js"></script>

    <script>

        //Initialise
        var nodeName = '';
        var ids = '';
        var classes = '';

        $('*').hover(function(e)
        {
            //Clear
            nodeName = '';
            ids = '';
            classes = '';

            nodeName = $(this).context.nodeName.toLowerCase();

            if ($(this).attr('id') != undefined)
            {
                ids = ' #' + $(this).attr('id');
            }

            if ($(this).attr('class') != undefined)
            {
                classes = ' .' + $(this).attr('class');
            }

            $('p#info span').text(nodeName+ids+classes)
        })
    </script>

</body>

我已经设法让它以一种方式工作，当从外部元素到内部元素时，它正确地报告了信息，但是当反向进行时，报告的元素是前一个

<head>

    <meta charset="utf-8">

    <title>Element Hover</title>

    <style>

        html                {margin:0; padding:40px 20px 0; background:#333; font:0.9em/1.1em "Arial", sans-serif}
        body                {margin:0; padding:0 0 10px; background:#555}

        #outerContainer     {margin:20px; padding:0; background:#777; width:240px; height:260px;}
        #innerContainer     {margin:20px; padding:0; background:#999; width:200px; height:200px;}

        p#info              {position:absolute; top:0; left:0}
        p                   {margin:0; padding:0; color:white}

    </style>

</head>

<body>

    <p id="info">Current element: <span></span></p>

    <p>Body</p>

    <div id="outerContainer">
        <p>Outer</p>

        <div id="innerContainer">
            <p>Inner</p>
        </div>

    </div>

    <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.0/jquery.min.js"></script>

    <script>

        //Initialise
        var nodeName = '';
        var ids = '';
        var classes = '';

        $('*').hover(function(e)
        {
            //Clear
            nodeName = '';
            ids = '';
            classes = '';

            nodeName = $(this).context.nodeName.toLowerCase();

            if ($(this).attr('id') != undefined)
            {
                ids = ' #' + $(this).attr('id');
            }

            if ($(this).attr('class') != undefined)
            {
                classes = ' .' + $(this).attr('class');
            }

            $('p#info span').text(nodeName+ids+classes)
        })
    </script>

</body>

要看到它在起作用——

<head>

    <meta charset="utf-8">

    <title>Element Hover</title>

    <style>

        html                {margin:0; padding:40px 20px 0; background:#333; font:0.9em/1.1em "Arial", sans-serif}
        body                {margin:0; padding:0 0 10px; background:#555}

        #outerContainer     {margin:20px; padding:0; background:#777; width:240px; height:260px;}
        #innerContainer     {margin:20px; padding:0; background:#999; width:200px; height:200px;}

        p#info              {position:absolute; top:0; left:0}
        p                   {margin:0; padding:0; color:white}

    </style>

</head>

<body>

    <p id="info">Current element: <span></span></p>

    <p>Body</p>

    <div id="outerContainer">
        <p>Outer</p>

        <div id="innerContainer">
            <p>Inner</p>
        </div>

    </div>

    <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.0/jquery.min.js"></script>

    <script>

        //Initialise
        var nodeName = '';
        var ids = '';
        var classes = '';

        $('*').hover(function(e)
        {
            //Clear
            nodeName = '';
            ids = '';
            classes = '';

            nodeName = $(this).context.nodeName.toLowerCase();

            if ($(this).attr('id') != undefined)
            {
                ids = ' #' + $(this).attr('id');
            }

            if ($(this).attr('class') != undefined)
            {
                classes = ' .' + $(this).attr('class');
            }

            $('p#info span').text(nodeName+ids+classes)
        })
    </script>

</body>

<head>

    <meta charset="utf-8">

    <title>Element Hover</title>

    <style>

        html                {margin:0; padding:40px 20px 0; background:#333; font:0.9em/1.1em "Arial", sans-serif}
        body                {margin:0; padding:0 0 10px; background:#555}

        #outerContainer     {margin:20px; padding:0; background:#777; width:240px; height:260px;}
        #innerContainer     {margin:20px; padding:0; background:#999; width:200px; height:200px;}

        p#info              {position:absolute; top:0; left:0}
        p                   {margin:0; padding:0; color:white}

    </style>

</head>

<body>

    <p id="info">Current element: <span></span></p>

    <p>Body</p>

    <div id="outerContainer">
        <p>Outer</p>

        <div id="innerContainer">
            <p>Inner</p>
        </div>

    </div>

    <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.0/jquery.min.js"></script>

    <script>

        //Initialise
        var nodeName = '';
        var ids = '';
        var classes = '';

        $('*').hover(function(e)
        {
            //Clear
            nodeName = '';
            ids = '';
            classes = '';

            nodeName = $(this).context.nodeName.toLowerCase();

            if ($(this).attr('id') != undefined)
            {
                ids = ' #' + $(this).attr('id');
            }

            if ($(this).attr('class') != undefined)
            {
                classes = ' .' + $(this).attr('class');
            }

            $('p#info span').text(nodeName+ids+classes)
        })
    </script>

</body>

尝试使用$e.currentTarget而不是$this

您需要注意以下事项

<head>

    <meta charset="utf-8">

    <title>Element Hover</title>

    <style>

        html                {margin:0; padding:40px 20px 0; background:#333; font:0.9em/1.1em "Arial", sans-serif}
        body                {margin:0; padding:0 0 10px; background:#555}

        #outerContainer     {margin:20px; padding:0; background:#777; width:240px; height:260px;}
        #innerContainer     {margin:20px; padding:0; background:#999; width:200px; height:200px;}

        p#info              {position:absolute; top:0; left:0}
        p                   {margin:0; padding:0; color:white}

    </style>

</head>

<body>

    <p id="info">Current element: <span></span></p>

    <p>Body</p>

    <div id="outerContainer">
        <p>Outer</p>

        <div id="innerContainer">
            <p>Inner</p>
        </div>

    </div>

    <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.0/jquery.min.js"></script>

    <script>

        //Initialise
        var nodeName = '';
        var ids = '';
        var classes = '';

        $('*').hover(function(e)
        {
            //Clear
            nodeName = '';
            ids = '';
            classes = '';

            nodeName = $(this).context.nodeName.toLowerCase();

            if ($(this).attr('id') != undefined)
            {
                ids = ' #' + $(this).attr('id');
            }

            if ($(this).attr('class') != undefined)
            {
                classes = ' .' + $(this).attr('class');
            }

            $('p#info span').text(nodeName+ids+classes)
        })
    </script>

</body>

您应该真正实现onmousemove，因为当您从父元素移入子元素并离开子元素时，它不会为父元素更新，因为您从未进入/离开父元素。你应该使用e.target而不是这个清除全局变量，因为它可能会遗留到下一个元素。演示：

<head>

    <meta charset="utf-8">

    <title>Element Hover</title>

    <style>

        html                {margin:0; padding:40px 20px 0; background:#333; font:0.9em/1.1em "Arial", sans-serif}
        body                {margin:0; padding:0 0 10px; background:#555}

        #outerContainer     {margin:20px; padding:0; background:#777; width:240px; height:260px;}
        #innerContainer     {margin:20px; padding:0; background:#999; width:200px; height:200px;}

        p#info              {position:absolute; top:0; left:0}
        p                   {margin:0; padding:0; color:white}

    </style>

</head>

<body>

    <p id="info">Current element: <span></span></p>

    <p>Body</p>

    <div id="outerContainer">
        <p>Outer</p>

        <div id="innerContainer">
            <p>Inner</p>
        </div>

    </div>

    <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.0/jquery.min.js"></script>

    <script>

        //Initialise
        var nodeName = '';
        var ids = '';
        var classes = '';

        $('*').hover(function(e)
        {
            //Clear
            nodeName = '';
            ids = '';
            classes = '';

            nodeName = $(this).context.nodeName.toLowerCase();

            if ($(this).attr('id') != undefined)
            {
                ids = ' #' + $(this).attr('id');
            }

            if ($(this).attr('class') != undefined)
            {
                classes = ' .' + $(this).attr('class');
            }

            $('p#info span').text(nodeName+ids+classes)
        })
    </script>

</body>

您需要注意以下事项

<head>

    <meta charset="utf-8">

    <title>Element Hover</title>

    <style>

        html                {margin:0; padding:40px 20px 0; background:#333; font:0.9em/1.1em "Arial", sans-serif}
        body                {margin:0; padding:0 0 10px; background:#555}

        #outerContainer     {margin:20px; padding:0; background:#777; width:240px; height:260px;}
        #innerContainer     {margin:20px; padding:0; background:#999; width:200px; height:200px;}

        p#info              {position:absolute; top:0; left:0}
        p                   {margin:0; padding:0; color:white}

    </style>

</head>

<body>

    <p id="info">Current element: <span></span></p>

    <p>Body</p>

    <div id="outerContainer">
        <p>Outer</p>

        <div id="innerContainer">
            <p>Inner</p>
        </div>

    </div>

    <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.0/jquery.min.js"></script>

    <script>

        //Initialise
        var nodeName = '';
        var ids = '';
        var classes = '';

        $('*').hover(function(e)
        {
            //Clear
            nodeName = '';
            ids = '';
            classes = '';

            nodeName = $(this).context.nodeName.toLowerCase();

            if ($(this).attr('id') != undefined)
            {
                ids = ' #' + $(this).attr('id');
            }

            if ($(this).attr('class') != undefined)
            {
                classes = ' .' + $(this).attr('class');
            }

            $('p#info span').text(nodeName+ids+classes)
        })
    </script>

</body>

<head>

    <meta charset="utf-8">

    <title>Element Hover</title>

    <style>

        html                {margin:0; padding:40px 20px 0; background:#333; font:0.9em/1.1em "Arial", sans-serif}
        body                {margin:0; padding:0 0 10px; background:#555}

        #outerContainer     {margin:20px; padding:0; background:#777; width:240px; height:260px;}
        #innerContainer     {margin:20px; padding:0; background:#999; width:200px; height:200px;}

        p#info              {position:absolute; top:0; left:0}
        p                   {margin:0; padding:0; color:white}

    </style>

</head>

<body>

    <p id="info">Current element: <span></span></p>

    <p>Body</p>

    <div id="outerContainer">
        <p>Outer</p>

        <div id="innerContainer">
            <p>Inner</p>
        </div>

    </div>

    <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.0/jquery.min.js"></script>

    <script>

        //Initialise
        var nodeName = '';
        var ids = '';
        var classes = '';

        $('*').hover(function(e)
        {
            //Clear
            nodeName = '';
            ids = '';
            classes = '';

            nodeName = $(this).context.nodeName.toLowerCase();

            if ($(this).attr('id') != undefined)
            {
                ids = ' #' + $(this).attr('id');
            }

            if ($(this).attr('class') != undefined)
            {
                classes = ' .' + $(this).attr('class');
            }

            $('p#info span').text(nodeName+ids+classes)
        })
    </script>

</body>

这似乎可以做得容易得多：这似乎可以做得容易得多：在Webkit和Firefox上似乎有完全相同的问题。在Webkit和Firefox上似乎存在完全相同的问题。太好了，非常感谢。为什么mousemove和e.target比hover和这个更有效呢？太好了，非常感谢。为什么mousemove和e.target比hover更有效？