CSS的background-size属性用于指定背景图像的大小。
示例
您可以尝试运行以下代码来实现背景 - CSS 中的 size 属性：
现场演示
<html>
<head>
<style>
#demo {
border: 5px dashed green;
padding: 10px;
background-image: url("https://www.tutorialspoint.com/css/images/css-mini-logo.jpg");
background-size: 200px 100px;
}
</style>
</head>
<body>
<div id="demo">
<h1>www.tutorialspoint.com</h1>
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</div>
</body>
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