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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
文字

语法:

nav-index:auto | <number>

默认值auto

适用于:所有 enabled 的元素

继承性:无

动画性:否

计算值:指定值

相关属性: <' nav-up '> || <' nav-right '> || <' nav-down '> || <' nav-left '>

取值:

  • auto:元素的导航焦点顺序由客户端自动分配。

  • <number>:用浮点数来定义元素的导航焦点顺序。若某元素的该值等于1则意味着该元素最先被导航。当若干个元素的nav-index值相同时,则按照文档的先后顺序进行导航。

说明:

设置或检索对象的导航顺序。
  • 该属性是HTML4/XHTML1中标签属性tabindex的替代品。

  • 只有支持nav-index属性的元素才能参与导航排序。

  • 被禁用的元素将不参与导航排序。

  • 该属性有被w3c标准移除的风险。

  • 对应的脚本特性为navIndex

兼容性:

ValuesIEFirefoxChromeSafariOperaiOS SafariAndroid BrowserAndroid Chrome
Basic Support6.0-11.02.0-40.04.0-45.06.0-8.015.0-29.06.0-8.32.1-4.4.418.0-42.0

示例:

实例

<!DOCTYPE html>
<html lang="zh-cmn-Hans">
<head>
<meta charset="utf-8" />
<title>nav-index_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>
html,body{margin:0;}
button{position:absolute;}
button#b1{
	top:0;left:50%;
	nav-index:1;
	nav-right:#b2;nav-left:#b4;
	nav-down:#b2;nav-up:#b4;
}
button#b2{
	top:50%;right:0;
	nav-index:2;
	nav-right:#b3;nav-left:#b1;
	nav-down:#b3;nav-up:#b1;
}
button#b3{
	left:50%;bottom:0;
	nav-index:3;
	nav-right:#b4;nav-left:#b2;
	nav-down:#b4;nav-up:#b2;
}
button#b4{
	top:50%;left:0;
	nav-index:4;
	nav-right:#b1;nav-left:#b3;
	nav-down:#b1;nav-up:#b3;
}
</style>
</head>
<body>
<div class="test">
	<button id="b1">button1</button>
	<button id="b2">button2</button>
	<button id="b3">button3</button>
	<button id="b4">button4</button>
</div>
</body>
</html>
			

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