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本文档使用
php.cn手册 发布
文字
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：
| Values | IE | Firefox | Chrome | Safari | Opera | iOS Safari | Android Browser | Android Chrome |
|---|---|---|---|---|---|---|---|---|
| Basic Support | 6.0-10.0 | 2.0-21.0 | 4.0-20.0 | 6.0 | 15.0+-webkit- | 6.0-6.1 | 2.1-4.3 | 18.0-19.0 |
| 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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