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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 网络安全字体 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 @property 规则


示例

指定渐变的两个自定义属性 - 并用它来动画化渐变

@property --startColor {
  syntax: "<color>";
  initial-value: #EADEDB;
  inherits: false;
}

@property --endColor {
  syntax: "<color>";
  initial-value: #BC70A4;
  inherits: false;
}
亲自尝试 »

更多“亲自尝试”示例如下。


定义和用法

The @property 规则用于在样式表中直接定义自定义 CSS 属性,而无需运行任何 JavaScript。

The @property 规则具有数据类型检查和约束,设置默认值,并定义属性是否可以继承值。

使用 @property 的好处

  • 类型检查和约束:您必须指定自定义属性的数据类型,例如 <number>、<color>、<length> 等。这可以防止错误并确保正确使用自定义属性
  • 设置默认值:您可以为自定义属性设置默认值。这样可以确保如果稍后分配了无效值,浏览器将使用定义的回退值
  • 设置继承行为:您必须指定自定义属性是否可以从其父元素继承值

定义自定义属性的示例

@property --my-color {
  syntax: "<color>";
  inherits: true;
  initial-value: lightgray;
}

以上定义表示 --my-color 是一个颜色属性,它可以从父元素继承值,其默认值为 lightgray。

在 CSS 中使用自定义属性

body {
  backgound-color: var(--my-color);
}

浏览器支持

表中的数字指定完全支持该规则的第一个浏览器版本。

属性
@property 85 85 128 16.4 71


CSS 语法

@property --propertyname {
 
syntax: "<color>";
  initial-value: red;
  inherits: false;
}

属性值

描述
--propertyname 必需。自定义属性的名称
syntax
initial-value
inherits
语法合法值:可以是 <length>、<number>、<percentage>、<length-percentage>、<color>、<image>、<url>、<integer>、<angle>、<time>、<resolution>、<transform-function> 或 <custom-ident>,或者数据类型和关键字值的列表。

+(空格分隔)和 #(逗号分隔)乘数表示期望一个值列表,例如 <color># 表示期望语法是 <color> 值的逗号分隔列表。

垂直线 (|) 可以为期望的语法创建“或”条件,例如 <length> | auto 接受 <length> 或 auto,而 <color># | <integer># 期望一个 <color> 值的逗号分隔列表或一个 <integer> 值的逗号分隔列表。

initial-value 的合法值:设置属性的初始值。

inherits 的合法值:True 或 false。控制 @property 指定的自定义属性注册是否默认继承。


更多示例

示例

指定两个自定义属性:一个用于项目大小,一个用于项目颜色

@property --item-size {
  syntax: "<percentage>";
  inherits: true;
  initial-value: 50%;
}

@property --item-color {
  syntax: "<color>";
  inherits: false;
  initial-value: lightgray;
}
亲自尝试 »

相关页面

CSS 教程:CSS - @property 规则



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