Examples of usage of hover pseudo-class in CSS

黄舟

Release： 2017-10-21 10:37:34

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: The use of hover, that is, the style setting made when the mouse pointer moves into the element

Example 1

<!DOCTYPE html><html lang="en"><head>
    <meta charset="UTF-8">
    <title>demo01</title>
    <style>
        *{
            margin: 0;
            padding: 0;
        }
        ul li{
            width: 300px;
            margin-top: 10px;
            background: #ff0000;
        }
        ul li:hover{
            background: #000000;
        }
    </style></head><body>
    <ul>
        <li></li>
        <li></li>
        <li></li>
    </ul></body></html>

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The above situation exists when the mouse pointer moves into an element and the element itself changes to a new style through:hover

Example 2

<!DOCTYPE html><html lang="en"><head>
    <meta charset="UTF-8">
    <title>demo01</title>
    <style>
        *{
            margin: 0;
            padding: 0;
        }
        .container{
            width: 300px;
            height: 300px;
            border: 1px solid #ff9f5a;
        }
        .content{
            width: 100px;
            height: 100px;
            background: #27e7ff;
        }
        .container:hover .content{
            background: #000000;
        }
    </style></head><body>
    <p class="container">
        <p class="content"></p>
    </p></body></html>

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In the above example , when there is a parent-child relationship, you can change the style of the child through the parent's :hover, written as

.container:hover .content, there is a space after hover; but , Child: hover cannot change the style of the parent

Example 3

<!DOCTYPE html><html lang="en"><head>
    <meta charset="UTF-8">
    <title>demo01</title>
    <style>
        *{
            margin: 0;
            padding: 0;
        }
        .container{
            width: 300px;
            height: 300px;
            border: 1px solid #ff9f5a;
        }
        .content{
            width: 100px;
            height: 100px;
            background: #27e7ff;
        }
        .container:hover +.content{
            background: #000000;
        }
    </style></head><body>
    <p class="container"></p>
    <p class="content"></p></body></html>

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