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CSS 参考

CSS 参考 CSS 浏览器支持 CSS 选择器 CSS 伪元素 CSS 组合器 CSS 函数 CSS 音频参考 CSS 网页安全字体 CSS 备用字体 CSS 可动画属性 CSS 单位 CSS PX-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-block-size max-height max-inline-size max-width @media 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-stop scroll-snap-type scrollbar-color 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 content 属性


示例

以下示例在每个 <a> 元素后面插入 href 属性的值(括号内)

a::after {
  content: " (" attr(href) ")";
}
亲自试一试 »

更多“亲自试一试”示例如下。


定义和用法

The content 属性与 ::before::after 伪元素一起使用,以插入生成的內容。

默认值 normal
继承
可动画 否。 了解有关 可动画 的信息
版本 CSS2
JavaScript 语法 您不能使用 JavaScript 为元素指定伪类,
但还有其他方法可以获得相同的结果: 试一试

浏览器支持

表中的数字指定完全支持该属性的第一个浏览器版本。

属性
content 1.0 8.0 1.0 1.0 4.0


CSS 语法

content: normal|none|counter|attr|string|open-quote|close-quote|no-open-quote|no-close-quote|url|initial|inherit;

属性值

描述 示例
normal 默认值。如果指定,则将内容设置为 normal,默认值为“none”(即无) 试一试 »
none 如果指定,则将内容设置为无 试一试 »
counter 将内容设置为计数器 试一试 »
attr(attribute) 将内容设置为选择器的某个属性 试一试 »
string 将内容设置为指定的文本 试一试 »
open-quote 将内容设置为开始引号 试一试 »
close-quote 将内容设置为结束引号 试一试 »
no-open-quote 如果指定,则删除内容中的开始引号 试一试 »
no-close-quote 如果指定,则删除内容中的结束引号 试一试 »
url(url) 将内容设置为某种媒体(图像、声音、视频等) 试一试 »
initial 将此属性设置为其默认值。 了解有关 initial 的信息
inherit 从其父元素继承此属性。 了解有关 inherit 的信息 试一试 »

更多示例

示例

如何通过删除 <ul> 或 <ol> 的默认项目符号并添加看起来像项目符号的 HTML 实体(&bull;)来为其添加项目符号颜色。

ul {
  list-style: none; /* 删除 HTML 项目符号 */
  padding: 0;
  margin: 0;
}

li {
  padding-left: 16px;
}

li::before {
  content: "•"; /* 插入看起来像项目符号的内容 */
  padding-right: 8px;
  color: blue; /* 或您喜欢的颜色 */
}
亲自试一试 »

相关页面

CSS 参考: ::before 伪元素

CSS 参考: ::after 伪元素


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