object-position

CSS 属性 object-position 规定了可替换元素的内容，在这里我们称其为对象（即 object-position 中的 object），在其内容框中的位置。可替换元素的内容框中未被对象所覆盖的部分，则会显示该元素的背景（background）。

你还可以使用 object-fit 属性来改变可替换元素的对象的内在（原文：intrinsic）大小（即它看上去的大小）的调整方式，借助拉伸与缩放等使对象更好地适应元素的内容框。

The source for this interactive example is stored in a GitHub repository. If you'd like to contribute to the interactive examples project, please clone https://github.com/mdn/interactive-examples and send us a pull request.

语法

/* <position> values */
object-position: center top;
object-position: 100px 50px;

/* Global values */
object-position: inherit;
object-position: initial;
object-position: unset;

取值

<position>

使用 1 到 4 个值来定义该元素在它所处的二维平面中的定位。可以使用相对或绝对偏移。

正式语法

<position>
where 
<position> = [ [ left | center | right ] || [ top | center | bottom ] | [ left | center | right | <length-percentage> ] [ top | center | bottom | <length-percentage> ]? | [ [ left | right ] <length-percentage> ] && [ [ top | bottom ] <length-percentage> ] ]
where 
<length-percentage> = <length> | <percentage>

例子

HTML

Here we see HTML that includes two <img> elements, each displaying the MDN logo.

<img id="object-position-1" src="https://mdn.mozillademos.org/files/12668/MDN.svg" alt="MDN Logo"/>
<img id="object-position-2" src="https://mdn.mozillademos.org/files/12668/MDN.svg" alt="MDN Logo"/>

CSS

img {
  width: 300px;
  height: 250px;
  border: 1px solid black;
  background-color: silver;
  margin-right: 1em;
  object-fit: none;
}

#object-position-1 {
  object-position: 10px;
}

#object-position-2 {
  object-position: 100% 10%;
}

The first image is positioned with its left edge inset 10 pixels from the left edge of the element's box. The second image is positioned with its right edge flush against the right edge of the element's box and is located 10% of the way down the height of the element's box.

输出

规范

Browser compatibility

参见

• 其他与图像相关的 CSS 属性: object-fit，image-orientation，image-rendering，image-resolution。