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watak

语法:

flex-grow:<number>

默认值0

适用于:flex子项

继承性:无

动画性:是

计算值:指定值

取值:

  • <number>:用数值来定义扩展比率。不允许负值

说明:

设置或检索弹性盒的扩展比率。
  • 根据弹性盒子元素所设置的扩展因子作为比率来分配剩余空间。

  • 示例:b,c将按照1:3的比率分配剩余空间

    Code:

    <ul class="flex">    <li>a</li>    <li>b</li>    <li>c</li> </ul> .flex{display:flex;width:600px;margin:0;padding:0;list-style:none;} .flex li:nth-child(1){width:200px;} .flex li:nth-child(2){flex-grow:1;width:50px;} .flex li:nth-child(3){flex-grow:3;width:50px;}

    flex-grow的默认值为0,如果没有显示定义该属性,是不会拥有分配剩余空间权利的。

    本例中b,c两项都显式的定义了flex-grow,flex容器的剩余空间分成了4份,其中b占1份,c占3分,即1:3

    flex容器的剩余空间长度为:600-200-50-50=300px,所以最终a,b,c的长度分别为:

    a: 50+(300/4)=200px

    b: 50+(300/4*1)=125px

    a: 50+(300/4*3)=275px

    • a

    • b

    • c

  • 对应的脚本特性为flexGrow

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-grow_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;
	width:600px;margin:0;padding:10px;list-style:none;background-color:#eee;}
.box li{width:100px;height:100px;border:1px solid #aaa;text-align:center;}
#box li:nth-child(2){
	-webkit-flex-grow:1;
	flex-grow:1;
}
#box li:nth-child(3){
	-webkit-flex-grow:2;
	flex-grow:2;
}
</style>
</head>
<body>
<h1>flex-grow示例:</h1>
<ul id="box" class="box">
	<li>a</li>
	<li>b</li>
	<li>c</li>
	<li>d</li>
	<li>e</li>
</ul>
</body>
</html>
			

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