예배 규칙서 찾다
简介 更新历史 关于样式表 属性 定位 布局 position z-index top right bottom left clip display float clear visibility overflow overflow-x overflow-y 尺寸 width min-width max-width height min-height max-height 外补白 margin margin-top margin-right margin-bottom margin-left 内补白 padding padding-top padding-right padding-bottom padding-left 边框 border border-width border-style border-color border-top border-top-width border-top-style border-top-color border-right border-right-width border-right-style border-right-color border-bottom border-bottom-width border-bottom-style border-bottom-style border-bottom-color border-left border-left-width border-left-style border-left-color border-radius border-top-left-radius border-top-right-radius border-bottom-right-radius border-bottom-left-radius box-shadow border-image border-image-source border-image-slice border-image-width border-image-outset border-image-repeat 背景 background background-color background-image background-repeat background-attachment background-position background-origin background-clip background-size 颜色 color opacity 字体 font font-style font-variant font-weight font-size font-family font-stretch font-size-adjust 文本 text-transform white-space tab-size word-break word-wrap overflow-wrap text-align text-align-last text-justify word-spacing letter-spacing text-indent vertical-align line-height text-size-adjust 文本装饰 text-decoration text-decoration-line text-decoration-color text-decoration-style text-decoration-skip text-underline-position text-shadow 书写模式 direction unicode-bidi writing-mode 列表 list-style list-style-image list-style-position list-style-type 表格 table-layout border-collapse border-spacing caption-side empty-cells 内容 content counter-increment counter-reset quotes 用户界面 appearance text-overflow outline outline-width outline-color outline-style outline-offset nav-index nav-up nav-right nav-down nav-left cursor zoom box-sizing resize ime-mode user-select pointer-events 多列 columns column-width column-count column-gap column-rule column-rule-width column-rule-style column-rule-color column-span column-fill column-break-before column-break-after column-break-inside 伸缩盒(旧) box-orient box-pack box-align box-flex box-flex-group box-ordinal-group box-direction box-lines 伸缩盒(新) flex flex-grow flex-shrink flex-basis flex-flow flex-direction flex-wrap align-content align-items align-self justify-content order 变换 transform transform-origin transform-style perspective perspective-origin backface-visibility 过渡 transition transition-property transition-duration transition-timing-function transition-delay 动画 animation animation-name animation-duration animation-timing-function animation-delay animation-iteration-count animation-direction animation-play-state animation-fill-mode 打印 page page-break-before page-break-after page-break-inside 媒体查询 width height device-width device-height orientation aspect-ratio device-aspect-ratio color color-index monochrome resolution scan grid Only IE scrollbar-3dlight-color scrollbar-darkshadow-color scrollbar-highlight-color scrollbar-shadow-color scrollbar-arrow-color scrollbar-face-color scrollbar-track-color scrollbar-base-color filter behavior Only webkit -webkit-text-fill-color -webkit-text-stroke -webkit-text-stroke-width -webkit-text-stroke-color -webkit-box-reflect -webkit-tap-highlight-color -webkit-user-drag -webkit-overflow-scrolling 选择符 元素选择符 通配选择符(*) 类型选择符(E) ID选择符(E#id) 类选择符(E.class) 关系选择符 包含选择符(E F) 子选择符(E>F) 相邻选择符(E+F) 兄弟选择符(E~F) 属性选择符 E[att] E[att="val"] E[att~="val"] E[att^="val"] E[att$="val"] E[att*="val"] E[att|="val"] 伪类选择符 E:link E:visited E:hover E:active E:focus E:lang(fr) E:not(s) E:root E:first-child E:last-child E:only-child E:nth-child(n) E:nth-last-child(n) E:first-of-type E:last-of-type E:only-of-type E:nth-of-type(n) E:nth-last-of-type(n) E:empty E:checked E:enabled E:disabled E:target @page:first @page:left @page:right 伪对象选择符 E:first-letter/E::first-letter E:first-line/E::first-line E:before/E::before E:after/E::after E::placeholder E::selection 语法与规则 !important /*comment*/ @import @charset @media @font-face @page @keyframes @supports 取值与单位 长度 <length> em ex ch rem vw vh vmax vmin cm mm q in pt pc px 角度 <angle> deg grad rad turn 时间 <time> s ms 频率 <frequency> Hz kHz 布局 <fraction> <grid> fr gr 分辨率 <resolution> dpi dpcm dppx 颜色 <color> Color Name HEX RGB RGBA HSL HSLA transparent currentColor 文本 inherit initial unset <string> <url> <identifier> 函数 calc() toggle() 生成内容 counter() counters() attr() 图像 <image> image() image-set() <gradient> linear-gradient() radial-gradient() repeating-linear-gradient() repeating-radial-gradient() 数字 <number> <integer> <percentage> 附录 颜色关键字 媒体类型 CSS Hack 条件Hack 属性级Hack 选择符级Hack 问题和经验 Bugs和解决方案 技巧和经验 其它经验
문자

语法:

content:[ [<uri> | icon] ',' ]* [ normal | none | inhibit | <content-list> ]

<content-list> = [ pending(<identifier>) | <string> | contents | footnote | endnote | section-note | list-item | <counter> | <named-string> | open-quote | close-quote | no-open-quote | no-close-quote | icon | <glyph> | <uri> | <datetime> | document-url | <target> ]+

<counter> = counter(name) | counter(name,list-style-type) | counters(name,string) | counters(name,string,list-style-type)

默认值normal

适用于:所有元素,::before, ::after, ::alternate, ::marker, ::line-marker, margin areas, @footnote areas

继承性:无

动画性:否

计算值:指定值

取值:

  • normal:默认值。表现与none值相同

  • none:不生成任何值。

  • <attr>:插入标签属性值

  • <url>:使用指定的绝对或相对地址插入一个外部资源(图像,声频,视频或浏览器支持的其他任何资源)

  • <string>:插入字符串

  • counter(name):使用已命名的计数器

  • counter(name,list-style-type):使用已命名的计数器并遵从指定的list-style-type属性

  • counters(name,string):使用所有已命名的计数器

  • counters(name,string,list-style-type):使用所有已命名的计数器并遵从指定的list-style-type属性

  • no-close-quote:并不插入quotes属性的后标记。但增加其嵌套级别

  • no-open-quote:并不插入quotes属性的前标记。但减少其嵌套级别

  • close-quote:插入quotes属性的后标记

  • open-quote:插入quotes属性的前标记

说明:

用来和:after及:before伪元素一起使用,在对象前或后显示内容。
  • 对应的脚本特性为content

兼容性:

ValuesIEFirefoxChromeSafariOperaiOS SafariAndroid BrowserAndroid Chrome
Basic Support6.0-7.02.0+4.0+6.0+15.0+6.0+2.1+18.0+
8.0+

示例:

实例

<!DOCTYPE html>
<html lang="zh-cmn-Hans">
<head>
<meta charset="utf-8" />
<title>content_CSS参考手册_web前端开发参考手册系列</title>
<meta name="author" content="Joy Du(飘零雾雨), dooyoe@gmail.com, www.doyoe.com" />
<style>
.string p:after{margin-left:-16px;background:#fff;content:"是";color:#f00;}
.attr p:after{content:attr(title);}
.url p:before{content:url(../../skin/ico.png);}
.test ol{margin:16px 0;padding:0;list-style:none;}
.counter1 li{counter-increment:testname;}
.counter1 li:before{content:counter(testname);color:#f00;font-family:georgia,serif,sans-serif;}
.counter2 li{counter-increment:testname2;}
.counter2 li:before{content:counter(testname2,lower-roman);color:#f00;font-family:georgia,serif,sans-serif;}
.counter3 ol ol{margin:0 0 0 28px;}
.counter3 li{padding:2px 0;counter-increment:testname3;}
.counter3 li:before{content:counter(testname3,decimal)".";color:#f00;font-family:georgia,serif,sans-serif;}
.counter3 li li{counter-increment:testname4;}
.counter3 li li:before{content:counter(testname3,decimal)"."counter(testname4,decimal)".";}
.counter3 li li li{counter-increment:testname5;}
.counter3 li li li:before{content:counter(testname3,decimal)"."counter(testname4,decimal)"."counter(testname5,decimal)".";}
</style>
</head>
<body>
<ul class="test">
	<li class="string">
		<strong>string:</strong>
		<p>你的浏览器是否支持content属性:否</p>
	</li>
	<li class="attr">
		<strong>attr:</strong>
		<p title="如果你看到我则说明你目前使用的浏览器支持content属性"></p>
	</li>
	<li class="url">
		<strong>url():</strong>
		<p>如果你看到文字前面的图标则说明你目前使用的浏览器支持content属性</p>
	</li>
	<li class="counter1">
		<strong>counter(name):</strong>
		<ol>
			<li>列表项</li>
			<li>列表项</li>
			<li>列表项</li>
		</ol>
	</li>
	<li class="counter2">
		<strong>counter(name,list-style-type):</strong>
		<ol>
			<li>列表项</li>
			<li>列表项</li>
			<li>列表项</li>
		</ol>
	</li>
	<li class="counter3">
		<strong>counter(name)拓展应用:</strong>
		<ol>
			<li>列表项
				<ol>
					<li>列表项
						<ol>
							<li>列表项</li>
							<li>列表项</li>
						</ol>
					</li>
					<li>列表项</li>
				</ol>
			</li>
			<li>列表项
				<ol>
					<li>列表项</li>
					<li>列表项</li>
				</ol>
			</li>
			<li>列表项
				<ol>
					<li>列表项</li>
					<li>列表项</li>
				</ol>
			</li>
		</ol>
	</li>
</ul>
</body>
</html>
			

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