backdrop-filter用法示例

洪七公 · 发表于 2023-6-1 09:03:07

简单的说，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: revert;
backdrop-filter: unset;

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语法
值
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。

形式化定义

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

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

是否是继承属性否

计算值 as specified

Animation type a filter function list

形式化语法

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( <string> <url-modifier>* ) |
src( <string> <url-modifier>* )
<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> ]? )

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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;
-webkit-backdrop-filter: blur(10px);
backdrop-filter: blur(10px);
max-width: 50%;
max-height: 50%;
padding: 20px 40px;
}
html,
body {
height: 100%;
width: 100%;
}
body {
background-image: url(https://picsum.photos/id/1080/6858/4574), linear-gradient(rgb(219, 166, 166), rgb(0, 0, 172));
background-position: center center;
background-repeat: no-repeat;
background-size: cover;
}
.container {
align-items: center;
display: flex;
justify-content: center;
height: 100%;
width: 100%;
}

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HTML

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

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[CSS/Html] backdrop-filter用法示例