css3背景

2024-03-07 21:28:51

背景图像区域
- background-clip
背景图像定位
- background-origin

背景图像区域

background-clip

指定背景绘制区域

语法

background-clip: border-box| padding-box  | content-box;

https://www.w3school.com.cn/cssref/pr_background-clip.asp

例子

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<style type="text/css">
    * {
        padding: 0;
        margin: 0;
    }

    div {
        width: 400px;
        height: 300px;
        padding: 20px;
        border: 20px solid transparent;
        background: #abcdef url(./background.jpg);
        background-clip: border-box;
        background-clip: padding-box;
        background-clip: content-box;
    }

    .border {
        position: absolute;
        top: 0;
        left: 0;
        width: 400px;
        height: 300px;
        padding: 20px;
        border: 20px solid rgba(255, 0, 0, .20);
    }

    .padding {
        width: 400px;
        height: 300px;
        position: absolute;
        top: 20px;
        left: 20px;
        border: 20px solid rgba(255, 255, 0, .20);
    }
</style>

<body>
    <div></div>
    <span class="border"></span>
    <span class="padding"></span>
</body>
</html>

content-box;

padding-box;

border-box;