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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 background 属性


实例

在一行声明中设置不同的背景属性

body {
  background: lightblue url("img_tree.gif") no-repeat fixed center;
}
亲自试一试 »

定义和用法

background 属性是以下属性的简写属性:

即使缺少上面的一些值也是允许的,例如:background:#ff0000 url(smiley.gif); 是允许的。

查看演示 ❯

默认值 查看单个属性
继承 no
可动画 是的,查看单个属性阅读关于可动画属性 
版本 CSS1 + CSS3 中的新属性
JavaScript 语法 object.style.background="red url(smiley.gif) top left no-repeat" Try it

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
background 1.0 4.0 1.0 1.0 3.5

注意:请参阅下方各个值的浏览器支持情况。


CSS 语法

background: bg-color bg-image position/bg-size bg-repeat bg-origin bg-clip bg-attachment initial|inherit;

注意: 如果简写声明中的属性之一是 bg-size 属性,则必须使用 / (斜杠)将其与 bg-position 属性分开,例如:background:url(smiley.gif) 10px 20px/50px 50px; 将会得到一个背景图像,位置在距离左侧 10 像素,距离顶部 20 像素,图像的大小将是 50 像素宽和 50 像素高。

注意: 如果使用多个 background-image 源但还想设置 background-color,则 background-color 参数需要放在列表的最后。

属性值

描述 CSS 演示
background-color 设置要使用的背景颜色 1 演示 ❯
background-image 设置要使用的一个或多个背景图像 1 演示 ❯
background-position 设置背景图像的位置 1 演示 ❯
background-size 设置背景图像的大小 3 演示 ❯
background-repeat 设置背景图像的重复方式 1 演示 ❯
background-origin 设置背景图像的定位区域 3 演示 ❯
background-clip 设置背景图像的绘制区域 3 演示 ❯
background-attachment 设置背景图像是固定的还是随页面滚动 1
initial 将此属性设置为其默认值。阅读关于initial 3
inherit 从其父元素继承此属性。阅读关于inherit 2

相关页面

CSS 教程:CSS 背景CSS 背景(进阶)

HTML DOM 参考:background property


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