CSS 4.2.4参考手册
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文字

语法：

flex-direction：row | row-reverse | column | column-reverse

默认值：row

适用于：flex容器

继承性：无

动画性：否

计算值：指定值

取值：

  • row：主轴与行内轴方向作为默认的书写模式。即横向从左到右排列（左对齐）。

  • row-reverse：对齐方式与row相反。

  • column：主轴与块轴方向作为默认的书写模式。即纵向从上往下排列（顶对齐）。

  • column-reverse：对齐方式与column相反。

说明：

该属性通过定义flex容器的主轴方向来决定felx子项在flex容器中的位置。这将决定flex需要如何进行排列

  • 该属性的反转取值不影响元素的绘制，语音和导航顺序，只改变流动方向。这与 <' writing-mode '> 和 <' direction '> 相同。

  • 示例：将一个容器内的子元素反转横向排列

    Code：

    <ul id="flex"> <li>a</li> <li>b</li> <li>c</li> </ul> #box { display: flex; flex-direction: row-reverse; list-style: none; }

    请自行根据需要补全厂商前缀。flex生效需定义 <' display '> 为flex或inline-flex(box或inline-box，这是旧的方式)

    • a

    • b

    • c

  • 对应的脚本特性为flexDirection。

兼容性：

ValuesIEFirefoxChromeSafariOperaiOS SafariAndroid BrowserAndroid Chrome
Basic Support6.0-10.02.0-21.04.0-20.06.015.0+-webkit-6.0-6.12.1-4.318.0-19.0
11.0+22.0+21.0+-webkit-6.1+-webkit-17.0+7.0+-webkit-4.4+20.0+-webkit-
29.0+9.0+9.0+28.0+

示例：

实例

<!DOCTYPE html>
<html lang="zh-cmn-Hans">
<head>
<meta charset="utf-8" />
<title>flex-direction_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>
h1{font:bold 20px/1.5 georgia,simsun,sans-serif;}
.box{
	display:-webkit-flex;
	display:flex;
	margin:0;padding:10px;list-style:none;background-color:#eee;}
.box li{width:100px;height:100px;border:1px solid #aaa;text-align:center;}
#box{
	-webkit-flex-direction:row;
	flex-direction:row;
}
#box2{
	-webkit-flex-direction:row-reverse;
	flex-direction:row-reverse;
}
#box3{
	height:500px;
	-webkit-flex-direction:column;
	flex-direction:column;
}
#box4{
	height:500px;
	-webkit-flex-direction:column-reverse;
	flex-direction:column-reverse;
}
</style>
</head>
<body>
<h1>flex-direction示例：</h1>
<h2>flex-direction:row</h2>
<ul id="box" class="box">
	<li>a</li>
	<li>b</li>
	<li>c</li>
</ul>
<h2>flex-direction:row-reverse</h2>
<ul id="box2" class="box">
	<li>a</li>
	<li>b</li>
	<li>c</li>
</ul>
<h2>flex-direction:column</h2>
<ul id="box3" class="box">
	<li>a</li>
	<li>b</li>
	<li>c</li>
</ul>
<h2>flex-direction:column-reverse</h2>
<ul id="box4" class="box">
	<li>a</li>
	<li>b</li>
	<li>c</li>
</ul>
</body>
</html>

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