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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 参考音频 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 float 属性


示例

让图像浮动到右侧

img  {
  float: right;
}
尝试一下 »

更多“尝试一下”示例在下面。


定义和用法

float 属性指定元素是否应该浮动到左侧、右侧还是根本不浮动。

注意:绝对定位的元素会忽略 float 属性!

注意:浮动元素旁边的元素会绕过它。要避免这种情况,请使用 clear 属性或 clearfix hack(请参见此页面底部的示例)。

显示演示 ❯

默认值 none
继承
可动画 否。 阅读关于 可动画
版本 CSS1
JavaScript 语法 object.style.cssFloat="left" 尝试一下

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
float 1.0 4.0 1.0 1.0 7.0


CSS 语法

float: none|left|right|initial|inherit;

属性值

描述 演示
none 元素不会浮动,(将按其在文本中出现的位置显示)。这是默认值 演示 ❯
left 元素浮动到其容器的左侧 演示 ❯
right 元素浮动到其容器的右侧 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

更多示例

示例

让图像浮动到左侧

img  {
  float: left;
}
尝试一下 »

示例

让图像按其在文本中出现的位置显示(float: none)

img  {
  float: none;
}
尝试一下 »

示例

让段落的第一个字母浮动到左侧并设置字母样式

span {
  float: left;
  width: 0.7em;
  font-size: 400%;
  font-family: algerian, courier;
  line-height: 80%;
}
尝试一下 »

示例

使用浮动和超链接列表来创建一个水平菜单

.header, .footer {
  background-color: grey;
  color: white;
  padding: 15px;
}

.column {
  float: left;
  padding: 15px;
}

.clearfix::after {
  content: "";
  clear: both;
  display: table;
}

.menu {width: 25%;}
.content {width: 75%;}
尝试一下 »

示例

使用浮动创建一个带有标题、页脚、左侧内容和主要内容的首页

.header, .footer {
  background-color: grey;
  color: white;
  padding: 15px;
}

.column {
  float: left;
  padding: 15px;
}

.clearfix::after {
  content: "";
  clear: both;
  display: table;
}

.menu {width: 25%;}
.content {width: 75%;}
尝试一下 »

示例

不允许浮动元素出现在指定 <p> 元素的左侧或右侧

img {
  float: left;
}

p.clear {
  clear: both;
}
尝试一下 »

示例

如果浮动元素的高度高于包含元素,它将溢出到其容器之外。可以使用“clearfix hack”来解决这个问题

.clearfix::after {
  content: "";
  clear: both;
  display: table;
}
尝试一下 »

相关页面

CSS 教程: CSS 浮动

HTML DOM 参考: cssFloat 属性


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