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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 border-radius 属性


示例

为两个 <div> 元素添加圆角

#example1 {
  border: 2px solid red;
  border-radius: 25px;
}

#example2 {
  border: 2px solid red;
  border-radius: 50px 20px;
}
亲自试一试 »

下面还有更多“亲自试一试”的示例。


定义和用法

border-radius 属性定义元素角的圆角半径。

提示:此属性允许您为元素添加圆角! 

此属性可以具有一个到四个值。以下是规则

四个值 - border-radius: 15px 50px 30px 5px; (第一个值应用于左上角,第二个值应用于右上角,第三个值应用于右下角,第四个值应用于左下角)

三个值 - border-radius: 15px 50px 30px;(第一个值应用于左上角,第二个值应用于右上角和左下角,第三个值应用于右下角)

两个值 - border-radius: 15px 50px; (第一个值应用于左上角和右下角,第二个值应用于右上角和左下角)

一个值 - border-radius: 15px; (该值应用于所有四个角,这些角的圆角相同)

显示演示 ❯

默认值 0
继承
可动画 是。 了解有关可动画的信息 试一试
版本 CSS3
JavaScript 语法 object.style.borderRadius="25px" 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
border-radius 5 9 4 5 10.5


CSS 语法

border-radius: 1-4 长度|% / 1-4 长度|%|initial|inherit;

注意:每个圆角的四个值按左上、右上、右下、左下的顺序给出。如果省略左下角,则它与右上角相同。如果省略右下角,则它与左上角相同。如果省略右上角,则它与左上角相同。

属性值

描述 演示
length 定义角的形状。默认值为 0。 了解有关长度单位的信息 演示 ❯
% 以 % 定义角的形状 演示 ❯
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

更多示例

示例

为具有背景色的元素设置圆角

#rcorners1 {
  border-radius: 25px;
  background: #73AD21;
  padding: 20px;
  width: 200px;
  height: 150px;
}
亲自试一试 »

示例

为具有边框的元素设置圆角

#rcorners2 {
  border-radius: 25px;
  border: 2px solid #73AD21;
  padding: 20px;
  width: 200px;
  height: 150px;
}
亲自试一试 »

示例

为具有背景图像的元素设置圆角: 

#rcorners3 {
  border-radius: 25px;
  background: url(paper.gif);
  background-position: left top;
background-repeat: repeat;
  padding: 20px;
  width: 200px;
  height: 150px;
}
亲自试一试 »

示例

另请注意: 

#example1 {
  border-radius: 2em / 5em;
}
/* 等效于
border-top-left-radius: 2em 5em;
border-top-right-radius: 2em 5em;
border-bottom-right-radius: 2em 5em;
border-bottom-left-radius: 2em 5em; */

#example2 {
  border-radius: 2em 1em 4em / 0.5em 3em;
}
/* 等效于
border-top-left-radius: 2em 0.5em;
border-top-right-radius: 1em 3em;
border-bottom-right-radius: 4em 0.5em;
border-bottom-left-radius: 1em 3em; */
亲自试一试 »

相关页面

CSS 教程: CSS 圆角

HTML DOM 参考: borderRadius 属性


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