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简介更新历史关于样式表属性定位布局positionz-indextoprightbottomleftclipdisplayfloatclearvisibilityoverflowoverflow-xoverflow-y尺寸widthmin-widthmax-widthheightmin-heightmax-height外补白marginmargin-topmargin-rightmargin-bottommargin-left内补白paddingpadding-toppadding-rightpadding-bottompadding-left边框borderborder-widthborder-styleborder-colorborder-topborder-top-widthborder-top-styleborder-top-colorborder-rightborder-right-widthborder-right-styleborder-right-colorborder-bottomborder-bottom-widthborder-bottom-styleborder-bottom-styleborder-bottom-colorborder-leftborder-left-widthborder-left-styleborder-left-colorborder-radiusborder-top-left-radiusborder-top-right-radiusborder-bottom-right-radiusborder-bottom-left-radiusbox-shadowborder-imageborder-image-sourceborder-image-sliceborder-image-widthborder-image-outsetborder-image-repeat背景backgroundbackground-colorbackground-imagebackground-repeatbackground-attachmentbackground-positionbackground-originbackground-clipbackground-size颜色coloropacity字体fontfont-stylefont-variantfont-weightfont-sizefont-familyfont-stretchfont-size-adjust文本text-transformwhite-spacetab-sizeword-breakword-wrapoverflow-wraptext-aligntext-align-lasttext-justifyword-spacingletter-spacingtext-indentvertical-alignline-heighttext-size-adjust文本装饰text-decorationtext-decoration-linetext-decoration-colortext-decoration-styletext-decoration-skiptext-underline-positiontext-shadow书写模式directionunicode-bidiwriting-mode列表list-stylelist-style-imagelist-style-positionlist-style-type表格table-layoutborder-collapseborder-spacingcaption-sideempty-cells内容contentcounter-incrementcounter-resetquotes用户界面appearancetext-overflowoutlineoutline-widthoutline-coloroutline-styleoutline-offsetnav-indexnav-upnav-rightnav-downnav-leftcursorzoombox-sizingresizeime-modeuser-selectpointer-events多列columnscolumn-widthcolumn-countcolumn-gapcolumn-rulecolumn-rule-widthcolumn-rule-stylecolumn-rule-colorcolumn-spancolumn-fillcolumn-break-beforecolumn-break-aftercolumn-break-inside伸缩盒(旧)box-orientbox-packbox-alignbox-flexbox-flex-groupbox-ordinal-groupbox-directionbox-lines伸缩盒(新)flexflex-growflex-shrinkflex-basisflex-flowflex-directionflex-wrapalign-contentalign-itemsalign-selfjustify-contentorder变换transformtransform-origintransform-styleperspectiveperspective-originbackface-visibility过渡transitiontransition-propertytransition-durationtransition-timing-functiontransition-delay动画animationanimation-nameanimation-durationanimation-timing-functionanimation-delayanimation-iteration-countanimation-directionanimation-play-stateanimation-fill-mode打印pagepage-break-beforepage-break-afterpage-break-inside媒体查询widthheightdevice-widthdevice-heightorientationaspect-ratiodevice-aspect-ratiocolorcolor-indexmonochromeresolutionscangridOnly IEscrollbar-3dlight-colorscrollbar-darkshadow-colorscrollbar-highlight-colorscrollbar-shadow-colorscrollbar-arrow-colorscrollbar-face-colorscrollbar-track-colorscrollbar-base-colorfilterbehaviorOnly 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:linkE:visitedE:hoverE:activeE:focusE:lang(fr)E:not(s)E:rootE:first-childE:last-childE:only-childE:nth-child(n)E:nth-last-child(n)E:first-of-typeE:last-of-typeE:only-of-typeE:nth-of-type(n)E:nth-last-of-type(n)E:emptyE:checkedE:enabledE:disabledE:target@page:first@page:left@page:right伪对象选择符E:first-letter/E::first-letterE:first-line/E::first-lineE:before/E::beforeE:after/E::afterE::placeholderE::selection语法与规则!important/*comment*/@import@charset@media@font-face@page@keyframes@supports取值与单位长度<length>emexchremvwvhvmaxvmincmmmqinptpcpx角度<angle>deggradradturn时间<time>sms频率<frequency>HzkHz布局<fraction><grid>frgr分辨率<resolution>dpidpcmdppx颜色<color>Color NameHEXRGBRGBAHSLHSLAtransparentcurrentColor文本inheritinitialunset<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
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语法:

border-top-left-radius:[ <length> | <percentage> ]{1,2}

默认值0

适用于:所有元素

继承性:无

动画性:是

计算值:指定值

取值:

  • <length>:

  • 用长度值设置对象的左上角(top-left)圆角半径长度。不允许负值

  • <percentage>:

  • 用百分比设置对象的左上角(top-left)圆角半径长度。不允许负值

说明:

设置或检索对象的左上角圆角边框。提供2个参数,2个参数以空格分隔,每个参数允许设置1个参数值,第1个参数表示水平半径,第2个参数表示垂直半径,如第2个参数省略,则默认等于第1个参数
  • 如设置border-top-left-radius:5px 10px表示top-left这个角的水平圆角半径为5px,垂直圆角半径为10px。

  • 对应的脚本特性为borderTopLeftRadius

兼容性:

  • 浅绿 = 支持

  • 红色 = 不支持

  • 粉色 = 部分支持

ValuesIEFirefoxChromeSafariOperaiOS SafariAndroid BrowserAndroid Chrome
Basic Support6.0-8.02.0-12.0
-moz- #1 #2
4.0-43.0
-webkit-
3.1-8.1
-webkit-
10.5-28.0
-webkit-
3.2-8.1
-webkit-
2.1-4.4.4
-webkit-
18.0-40.0
-webkit-
9.0+4.0+5.0+5.0+10.5+4.0+2.2+18.0+
  1. Firefox从13.0开始移除对-moz-的支持,仅支持标准的border-radius写法,在4.0-12.0区间,两种方式都支持。

  2. Firefox支持的厂商前缀写法是非标准的-moz-border-radius-topleft,而不是-moz-border-top-left-radius

  3. 实例

    <!DOCTYPE html>
    <html lang="zh-cmn-Hans">
    <head>
    <meta charset="utf-8" />
    <title>border-top-left-radius_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>
    ul {
    	margin: 0;
    	padding: 0;
    }
    li {
    	list-style: none;
    	margin: 10px 0 0 0;
    	padding: 10px;
    	background: #bbb;
    }
    .test .one {
    	border-top-left-radius: 30px;
    }
    .test .two {
    	border-top-left-radius: 10px 30px;
    }
    </style>
    </head>
    <body>
    <ul class="test">
    	<li class="one">水平与垂直半径相同时<br />border-top-left-radius:30px;</li>
    	<li class="two">水平与垂直半径不同时<br />border-top-left-radius:10px 30px;</li>
    </ul>
    </body>
    </html>

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