CSS悬停功能不起作用：将鼠标悬停在图标上时尝试显示说明

Question

So I am a beginner in programming, and I am having trouble making my code work. 因此，我是编程的初学者，但使我的代码无法正常工作。 I do not know why hover is not working and would love to find out what my bug is. 我不知道为什么悬停无法正常工作，很想找出我的错误所在。 As stated in the title, I would like to display a small note when hovering over an information icon (like the ones you find next to the input sections on online forms). 如标题中所述，将鼠标悬停在信息图标上时，我想显示一个小注释（例如您在在线表单的输入部分旁边找到的图标）。 I can't seem to figure out why my code is not working, but I feel like it must be some obvious error. 我似乎无法弄清楚为什么我的代码无法正常工作，但是我觉得这一定是一些明显的错误。

<html>
    <head>
        <link href="https://fonts.googleapis.com/css?family=Roboto" rel="stylesheet">
        <style>

            .image{
                height:20px;
                width:20px;
                padding-bottom: 5px;
            }
            .info{
                visibility: hidden;
                display: block;
                font-family: 'Roboto', sans-serif;
                font-size: 12px;
                color:#555555;
                background-color:#efefef;
                width:235px;
                padding: 3px 3px 3px 6px;
            }
            .image:hover .info{
                visibility: visible;
            }

        </style>
        <title>Info Button</title>
    </head>
    <body>
        <img class ="image" src="https://upload.wikimedia.org/wikipedia/commons/thumb/e/e4/Infobox_info_icon.svg/480px-Infobox_info_icon.svg.png" alt=""/>
        <div class ="info">
            Transcription: Type how your name sounds.<br/> Ex. Julio Santos => Who-le-o San-tos.

        </div>
     </body>
</html>

Thanks, 谢谢，

B 乙

Answer 1

Your mistake is in this selector .image:hover .info , you're trying to find an .info class nested inside .image , but your DOM doesn't have them nested. 您的错误在于此选择器.image:hover .info ，您试图找到嵌套在.image内的.info类，但您的DOM没有嵌套它们。 Try using a sibling selector instead .image:hover + .info . 尝试使用同级选择器代替.image:hover + .info 。

Answer 2

the only problem in your code was .image:hover .info{} . 您的代码中唯一的问题是.image:hover .info{} 。 Change it to .image:hover ~ .info{} or .image:hover + .info{} 将其更改为.image:hover ~ .info{}或.image:hover + .info{}

 .image{ height:20px; width:20px; padding-bottom: 5px; } .info{ display:none; font-family: 'Roboto', sans-serif; font-size: 12px; color:#555555; background-color:#efefef; width:235px; padding: 3px 3px 3px 6px; } .image:hover ~ .info{ display:block; }

 <link href="https://fonts.googleapis.com/css?family=Roboto" rel="stylesheet"> <img class ="image" src="https://upload.wikimedia.org/wikipedia/commons/thumb/e/e4/Infobox_info_icon.svg/480px-Infobox_info_icon.svg.png" alt=""/> <div class ="info"> Transcription: Type how your name sounds.<br/> Ex. Julio Santos => Who-le-o San-tos. </div>

CSS悬停功能不起作用：将鼠标悬停在图标上时尝试显示说明

问题描述

2 个解决方案

解决方案1
1 2017-05-04 05:08:53

解决方案2
0 2017-05-04 05:33:46

CSS悬停功能不起作用：将鼠标悬停在图标上时尝试显示说明

问题描述

2 个解决方案

解决方案1 1 2017-05-04 05:08:53

解决方案2 0 2017-05-04 05:33:46

解决方案1
1 2017-05-04 05:08:53

解决方案2
0 2017-05-04 05:33:46