导航
×
   ❮   
HTML CSS JavaScript PHP Go Sass W3C Colors ECMS

CSS 参考手册

CSS 浏览器支持 CSS 选择器 CSS 伪元素 CSS 组合符 CSS 函数 CSS 参考 (听觉) CSS 网页安全字体 CSS 字体回退 CSS 可动画属性 CSS PX 到 EM 转换器 CSS 颜色 CSS 颜色值 CSS 默认值 CSS 实体

CSS 属性

accent-color align-content align-items align-self all animation animation-delay animation-direction animation-duration animation-fill-mode animation-iteration-count animation-name animation-play-state animation-timing-function aspect-ratio backdrop-filter backface-visibility background background-attachment background-blend-mode background-clip background-color background-image background-origin background-position background-position-x background-position-y background-repeat background-size block-size border border-block border-block-color border-block-end border-block-end-color border-block-end-style border-block-end-width border-block-start border-block-start-color border-block-start-style border-block-start-width border-block-style border-block-width border-bottom border-bottom-color border-bottom-left-radius border-bottom-right-radius border-bottom-style border-bottom-width border-collapse border-color border-end-end-radius border-end-start-radius border-image border-image-outset border-image-repeat border-image-slice border-image-source border-image-width border-inline border-inline-color border-inline-end border-inline-end-color border-inline-end-style border-inline-end-width border-inline-start border-inline-start-color border-inline-start-style border-inline-start-width border-inline-style border-inline-width border-left border-left-color border-left-style border-left-width border-radius border-right border-right-color border-right-style border-right-width border-spacing border-start-end-radius border-start-start-radius border-style border-top border-top-color border-top-left-radius border-top-right-radius border-top-style border-top-width border-width bottom box-decoration-break box-reflect box-shadow box-sizing break-after break-before break-inside caption-side caret-color @charset clear clip clip-path color color-scheme column-count column-fill column-gap column-rule column-rule-color column-rule-style column-rule-width column-span column-width columns content counter-increment counter-reset counter-set cursor direction display empty-cells filter flex flex-basis flex-direction flex-flow flex-grow flex-shrink flex-wrap float font @font-face font-family font-feature-settings font-kerning font-size font-size-adjust font-stretch font-style font-variant font-variant-caps font-weight gap grid grid-area grid-auto-columns grid-auto-flow grid-auto-rows grid-column grid-column-end grid-column-start grid-row grid-row-end grid-row-start grid-template grid-template-areas grid-template-columns grid-template-rows hanging-punctuation height hyphens hyphenate-character image-rendering @import initial-letter inline-size inset inset-block inset-block-end inset-block-start inset-inline inset-inline-end inset-inline-start isolation justify-content justify-items justify-self @keyframes left letter-spacing line-height list-style list-style-image list-style-position list-style-type margin margin-block margin-block-end margin-block-start margin-bottom margin-inline margin-inline-end margin-inline-start margin-left margin-right margin-top marker marker-end marker-mid marker-start mask mask-clip mask-composite mask-image mask-mode mask-origin mask-position mask-repeat mask-size mask-type max-height max-width @media max-block-size max-inline-size min-block-size min-inline-size min-height min-width mix-blend-mode object-fit object-position offset offset-anchor offset-distance offset-path offset-position offset-rotate opacity order orphans outline outline-color outline-offset outline-style outline-width overflow overflow-anchor overflow-wrap overflow-x overflow-y overscroll-behavior overscroll-behavior-block overscroll-behavior-inline overscroll-behavior-x overscroll-behavior-y padding padding-block padding-block-end padding-block-start padding-bottom padding-inline padding-inline-end padding-inline-start padding-left padding-right padding-top page-break-after page-break-before page-break-inside paint-order perspective perspective-origin place-content place-items place-self pointer-events position @property quotes resize right rotate row-gap scale scroll-behavior scroll-margin scroll-margin-block scroll-margin-block-end scroll-margin-block-start scroll-margin-bottom scroll-margin-inline scroll-margin-inline-end scroll-margin-inline-start scroll-margin-left scroll-margin-right scroll-margin-top scroll-padding scroll-padding-block scroll-padding-block-end scroll-padding-block-start scroll-padding-bottom scroll-padding-inline scroll-padding-inline-end scroll-padding-inline-start scroll-padding-left scroll-padding-right scroll-padding-top scroll-snap-align scroll-snap-type scrollbar-color scroll-snap-stop tab-size table-layout text-align text-align-last text-decoration text-decoration-color text-decoration-line text-decoration-style text-decoration-thickness text-emphasis text-emphasis-color text-emphasis-position text-emphasis-style text-indent text-justify text-orientation text-overflow text-shadow text-transform text-underline-offset text-underline-position top transform transform-origin transform-style transition transition-delay transition-duration transition-property transition-timing-function translate unicode-bidi user-select vertical-align visibility white-space widows width word-break word-spacing word-wrap writing-mode z-index zoom

CSS box-shadow 属性


实例

为不同的<div> 元素添加阴影

#example1 {
  box-shadow: 5px 10px;
}

#example2 {
  box-shadow: 5px 10px #888888;
}
亲自试一试 »

更多“自己尝试”的例子见下文。


定义和用法

box-shadow 属性为元素附加一个或多个阴影。

查看演示 ❯

默认值 none
继承 no
可动画 是的。 阅读关于可动画属性 试一试
版本 CSS3
JavaScript 语法 object.style.boxShadow="10px 20px 30px blue" 试一试

浏览器支持

表中的数字指定了完全支持该属性的第一个浏览器版本。

属性
box-shadow 10 9 4 5 10.5

CSS 语法

box-shadow: none|h-offset v-offset blur spread color |inset|initial|inherit;

注意: 要为一个元素附加多个阴影,请使用逗号分隔的阴影列表(参见下面的“试一试”实例)。

属性值

描述 演示
none 默认值。不显示阴影 演示 ❯
h-offset 必需。阴影的水平偏移量。正值将阴影放在框的右侧,负值将阴影放在框的左侧 演示 ❯
v-offset 必需。阴影的垂直偏移量。正值将阴影放在框的下方,负值将阴影放在框的上方 演示 ❯
blur 可选。模糊半径。数字越大,阴影越模糊 演示 ❯
spread 可选。扩展半径。正值会增大阴影的大小,负值会减小阴影的大小 演示 ❯
color 可选。阴影的颜色。默认值为文本颜色。查看 CSS 颜色值 以获取完整的可能颜色值列表。

注意: 在 Safari (PC 上) 中,颜色参数是必需的。如果不指定颜色,则根本不显示阴影。
演示 ❯
inset 可选。将阴影从外部阴影(outset)更改为内部阴影 演示 ❯
initial 将此属性设置为其默认值。阅读关于initial
inherit 从其父元素继承此属性。阅读关于inherit

提示: 阅读更多关于允许值(CSS 长度单位)的信息


更多实例

实例

为阴影添加模糊效果

#example1 {
  box-shadow: 10px 10px 8px #888888;
}
亲自试一试 »

实例

定义阴影的扩展半径

#example1 {
  box-shadow: 10px 10px 8px 10px #888888;
}
亲自试一试 »

实例

定义多个阴影

#example1 {
  box-shadow: 5px 5px blue, 10px 10px red, 15px 15px green;
}
亲自试一试 »

实例

添加 inset 关键字

#example1 {
  box-shadow: 5px 10px inset;
}
亲自试一试 »

实例

图像放在桌子上。此实例演示了如何创建“宝丽来”图片并旋转图片

div.polaroid {
  width: 284px;
  padding: 10px 10px 20px 10px;
  border: 1px solid #BFBFBF;
  background-color: white;
  box-shadow: 10px 10px 5px #aaaaaa;
}
亲自试一试 »

相关页面

CSS 教程: CSS Box Shadow

HTML DOM 参考: boxShadow 属性


Copyright ©2020-2026 freew3c.com All Rights Reserved 提供的内容仅用于学习和测试,不保证内容的正确性。