35 lines
1.0 KiB
Markdown
35 lines
1.0 KiB
Markdown
---
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title: Background Size
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localeTitle: 背景大小
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---
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## 背景大小
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background-size属性指定背景图像的大小。您可以设置长度或百分比，第一个值是宽度，第二个值是高度。您还可以使用以下5个关键字值之一：
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```css
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.auto {background-size: auto;}
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.cover {background-size: cover;}
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.contain {background-size: contain;}
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.initial {background-size: initial;}
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.inherit {background-size: inherit;}
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/* Percentage and pixel can also be used */
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.pixel {background-size: 50px 50px;}
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.percentage {background-size: 50% 50%;}
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```
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要在多个背景图像上设置此属性，请用逗号分隔值：
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```css
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.multiple {
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background-image: url(1.png), url(2.png);
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background-size: 3px 3px, cover;
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}
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```
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#### 更多信息：
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文档： [MDN](https://developer.mozilla.org/en-US/docs/Web/CSS/background-size)
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CSS-Tricks： [背景大小](https://css-tricks.com/almanac/properties/b/background-size/)
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浏览器支持： [caniuse](http://caniuse.com/#search=background-size) |