freeCodeCamp/guide/chinese/css/object-fit/index.md

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---
title: Object Fit
localeTitle: 对象适合
---
# 对象适合
`object-fit`属性指定元素如何响应其父框的宽度/高度。
此属性可用于图像,视频或任何其他媒体。它还可以与`object-position`属性一起使用,以更好地控制媒体的显示方式。
基本上我们使用`object-fit`属性来定义它如何拉伸或挤压内联媒体。
## 句法
```css
.element {
object-fit: fill || contain || cover || none || scale-down;
}
```
## 值
* `fill` **这是默认值** 。无论宽高比如何,都要调整内容大小以匹配其父框。
* `contain` :使用正确的宽高比调整内容大小以填充其父框。
* `cover` :类似于`contain`但经常裁剪内容。
* `none` :以原始大小显示图像。
* `scale-down` :比较`none`和`contain`之间的差异,找到最小的具体对象大小。
## 浏览器兼容性
大多数现代浏览器都支持`object-fit` 有关兼容性的最新信息请查看http://caniuse.com/#search=object-fit
还有一个不受支持的浏览器主要是IE的polyfill。 https://github.com/anselmh/object-fit
## 更多信息
https://developer.mozilla.org/en-US/docs/Web/CSS/object-fit https://drafts.csswg.org/css-images-3/#the-object-fit