css属性总结background-clip

1.background-clip

| border-box | 背景被裁剪到边框盒。
| padding-box | 背景被裁剪到内边距框。
| content-box | 背景被裁剪到内容框。

测试代码

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style>
        .test2 {
            width: 100px;
            height: 10px;
            padding: 20px 0;
            background: red;
            background-clip: content-box;
        }
    </style>
</head>

<body>
    <div class='test2'></div>
</body>

</html>

1.效果： content-box

85a40bafbccee65672d3b09da7d752a.png

2.效果：padding-box，content-box

6fe66417bb9f6fa67b1124b524f2efa.png

3.应用

写一个三个横线的三个图标效果

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<style>
    .menu-outer {
        position: relative;
        display: inline-block;
        margin: 30px;
        width: 20px;
        height: 24px;
        cursor: pointer;
    }


    .menu {
        position: absolute;
        top: 50%;
        left: 50%;
        width: 20px;
        height: 2px;
        padding: 8px 0;
        transform: translate(-50%, -50%);
        background-clip: content-box;
        background-color: #585247;
    }

    .menu::after,
    .menu::before {
        position: absolute;
        left: 0;
        display: inline-block;
        content: '';
        width: 100%;
        height: 2px;
        background-color: #585247;

    }

    .menu::before {
        top: 0;
    }

    .menu::after {
        bottom: 0;
    }
</style>

<body>

    <div class="menu-outer">
        <span class="menu"></span>
    </div>

</body>

</html>