backdrop-filter

Limited availability

This feature is not Baseline because it does not work in some of the most widely-used browsers.

**backdrop-filter** CSS 属性允许您对元素后面的区域应用图形效果，例如模糊或颜色偏移。由于它应用于元素**后面**的所有内容，因此要看到效果，元素或其背景需要是透明或部分透明的。

试一试

语法

css

/* Keyword value */
backdrop-filter: none;

/* URL to SVG filter */
backdrop-filter: url(commonfilters.svg#filter);

/* <filter-function> values */
backdrop-filter: blur(2px);
backdrop-filter: brightness(60%);
backdrop-filter: contrast(40%);
backdrop-filter: drop-shadow(4px 4px 10px blue);
backdrop-filter: grayscale(30%);
backdrop-filter: hue-rotate(120deg);
backdrop-filter: invert(70%);
backdrop-filter: opacity(20%);
backdrop-filter: sepia(90%);
backdrop-filter: saturate(80%);

/* Multiple filters */
backdrop-filter: url(filters.svg#filter) blur(4px) saturate(150%);

/* Global values */
backdrop-filter: inherit;
backdrop-filter: initial;
backdrop-filter: revert;
backdrop-filter: revert-layer;
backdrop-filter: unset;

Values

none: 不应用任何滤镜到背景。
<filter-function-list>: 一个空格分隔的 <filter-function> 列表或 SVG 滤镜，它将应用于背景。CSS <filter-function> 包括 blur()、brightness()、contrast()、drop-shadow()、grayscale()、hue-rotate()、invert()、opacity()、saturate() 和 sepia()。

正式定义

Initial value	`none`
Applies to	所有元素；在 SVG 中，它应用于容器元素，不包括 `<defs>` 元素和所有图形元素
Inherited	no
Computed value	as specified
Animation type	一个滤镜函数列表

正式语法

backdrop-filter = 
  none                 |
  <filter-value-list>  

<filter-value-list> = 
  [ <filter-function> | <url> ]+  

<filter-function> = 
  <blur()>         |
  <brightness()>   |
  <contrast()>     |
  <drop-shadow()>  |
  <grayscale()>    |
  <hue-rotate()>   |
  <invert()>       |
  <opacity()>      |
  <sepia()>        |
  <saturate()>     

<url> = 
  <url()>  |
  <src()>  

<blur()> = 
  blur( <length>? )  

<brightness()> = 
  brightness( [ <number> | <percentage> ]? )  

<contrast()> = 
  contrast( [ <number> | <percentage> ]? )  

<drop-shadow()> = 
  drop-shadow( [ <color>? && <length>{2,3} ] )  

<grayscale()> = 
  grayscale( [ <number> | <percentage> ]? )  

<hue-rotate()> = 
  hue-rotate( [ <angle> | <zero> ]? )  

<invert()> = 
  invert( [ <number> | <percentage> ]? )  

<opacity()> = 
  opacity( [ <number> | <percentage> ]? )  

<sepia()> = 
  sepia( [ <number> | <percentage> ]? )  

<saturate()> = 
  saturate( [ <number> | <percentage> ]? )  

<url()> = 
  url( <string> <url-modifier>* )  |
  <url-token>                      

<src()> = 
  src( <string> <url-modifier>* )

示例

CSS

css

.box {
  background-color: rgb(255 255 255 / 30%);
  backdrop-filter: blur(10px);
}

body {
  background-image: url("anemones.jpg");
}

html,
body {
  height: 100%;
  width: 100%;
}

.container {
  background-size: cover;
  align-items: center;
  display: flex;
  justify-content: center;
  height: 100%;
  width: 100%;
}
.box {
  border-radius: 5px;
  font-family: sans-serif;
  text-align: center;
  max-width: 50%;
  max-height: 50%;
  padding: 20px 40px;
}

HTML

html

<div class="container">
  <div class="box">
    <p>backdrop-filter: blur(10px)</p>
  </div>
</div>

Result

规范

Specification
Filter Effects Module Level 2 # BackdropFilterProperty

浏览器兼容性

BCD 表格仅在浏览器中加载