backdrop-filter

backdrop-filter CSS 属性可以让你为一个元素后面区域添加图形效果(如模糊或颜色偏移)。 因为它适用于元素背后的所有元素,为了看到效果,必须使元素或其背景至少部分透明。

/* 关键词值 */
backdrop-filter: none;

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

/* <filter-function> 滤镜函数值 */
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%);

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

/* 全局值 */
backdrop-filter: inherit;
backdrop-filter: initial;
backdrop-filter: unset;
初始值none
适用元素all elements; In SVG, it applies to container elements excluding the defs element and all graphics elements
是否是继承属性
计算值as specified
Animation typea filter function list

语法

none
没有应用于背景的滤镜
<filter-function-list>
一个以空格分隔的滤镜函数(<filter-function>)或是要应用到背景上的 SVG 滤镜

形式化语法

none | <filter-function-list>

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

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

where
<blur()> = blur( <length> )
<brightness()> = brightness( <number-percentage> )
<contrast()> = contrast( [ <number-percentage> ] )
<drop-shadow()> = drop-shadow( <length>{2,3} <color>? )
<grayscale()> = grayscale( <number-percentage> )
<hue-rotate()> = hue-rotate( <angle> )
<invert()> = invert( <number-percentage> )
<opacity()> = opacity( [ <number-percentage> ] )
<saturate()> = saturate( <number-percentage> )
<sepia()> = sepia( <number-percentage> )

where
<number-percentage> = <number> | <percentage>
<color> = <rgb()> | <rgba()> | <hsl()> | <hsla()> | <hex-color> | <named-color> | currentcolor | <deprecated-system-color>

where
<rgb()> = rgb( <percentage>{3} [ / <alpha-value> ]? ) | rgb( <number>{3} [ / <alpha-value> ]? ) | rgb( <percentage>#{3} , <alpha-value>? ) | rgb( <number>#{3} , <alpha-value>? )
<rgba()> = rgba( <percentage>{3} [ / <alpha-value> ]? ) | rgba( <number>{3} [ / <alpha-value> ]? ) | rgba( <percentage>#{3} , <alpha-value>? ) | rgba( <number>#{3} , <alpha-value>? )
<hsl()> = hsl( <hue> <percentage> <percentage> [ / <alpha-value> ]? ) | hsl( <hue>, <percentage>, <percentage>, <alpha-value>? )
<hsla()> = hsla( <hue> <percentage> <percentage> [ / <alpha-value> ]? ) | hsla( <hue>, <percentage>, <percentage>, <alpha-value>? )

where
<alpha-value> = <number> | <percentage>
<hue> = <number> | <angle>

示例

CSS

.box {
  background-color: rgba(255, 255, 255, 0.3);
  border-radius: 5px;
  font-family: sans-serif;
  text-align: center;
  line-height: 1; 
  backdrop-filter: blur(10px);  
  -webkit-backdrop-filter: blur(10px);
  max-width: 50%;
  max-height: 50%;
  padding: 20px 40px;
}

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

body {
  background-image: url('https://lorempixel.com/400/200/');
  background-position: center center;
  background-repeat: no-repeat;
  background-size: cover;
}

.container {
  align-items: center;
  display: flex;
  justify-content: center;
  height: 100%;
  width: 100%;
}

HTML

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

结果

规范

规范 状态 备注
Filter Effects Module Level 2
backdrop-filter
Editor's Draft 初始版本。

浏览器兼容性

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
backdrop-filterChrome Full support 76
Full support 76
Full support 47
Disabled
Disabled From version 47: this feature is behind the Enable Experimental Web Platform Features preference. To change preferences in Chrome, visit chrome://flags.
Edge Full support 17Firefox Full support 70
Disabled
Full support 70
Disabled
Disabled From version 70: this feature is behind the layout.css.backdrop-filter.enabled preference (needs to be set to true) and the gfx.webrender.all preference (needs to be set to true). To change preferences in Firefox, visit about:config.
IE No support NoOpera Full support 34
Disabled
Full support 34
Disabled
Disabled From version 34: this feature is behind the Enable Experimental Web Platform Features preference.
Safari Full support 9
Prefixed
Full support 9
Prefixed
Prefixed Implemented with the vendor prefix: -webkit-
WebView Android Full support 76Chrome Android Full support 76
Full support 76
Full support 47
Disabled
Disabled From version 47: this feature is behind the Enable Experimental Web Platform Features preference. To change preferences in Chrome, visit chrome://flags.
Firefox Android No support No
Notes
No support No
Notes
Notes See bug 1178765.
Opera Android Full support 54
Full support 54
Full support 34
Disabled
Disabled From version 34: this feature is behind the Enable Experimental Web Platform Features preference.
Safari iOS Full support 9
Prefixed
Full support 9
Prefixed
Prefixed Implemented with the vendor prefix: -webkit-
Samsung Internet Android No support No

Legend

Full support  
Full support
No support  
No support
See implementation notes.
See implementation notes.
User must explicitly enable this feature.
User must explicitly enable this feature.
Requires a vendor prefix or different name for use.
Requires a vendor prefix or different name for use.

参见