<!DOCTYPE html>
<html>
<head>
<title>Заголовок документа</title>
<style>
.box {
width: 320px;
height: 120px;
border: 2px solid #ccc;
display: -webkit-flex; /* Safari */
display: flex;
}
/* Safari 6.1+ */
.box div:nth-of-type(1) {-webkit-flex-grow: 1;}
.box div:nth-of-type(2) {-webkit-flex-grow: 2;}
.box div:nth-of-type(3) {-webkit-flex-grow: 1;}
.box div:nth-of-type(4) {-webkit-flex-grow: 1;}
.box div:nth-of-type(5) {-webkit-flex-grow: 1;}
/* Standard syntax */
.box div:nth-of-type(1) {flex-grow: 1;}
.box div:nth-of-type(2) {flex-grow: 2;}
.box div:nth-of-type(3) {flex-grow: 1;}
.box div:nth-of-type(4) {flex-grow: 1;}
.box div:nth-of-type(5) {flex-grow: 1;}
</style>
</head>
<body>
<h2>Пример свойства flex-grow</h2>
<div class="box">
<div style="background-color: #eee;"></div>
<div style="background-color: #1c87c9;"></div>
<div style="background-color: #8ebf42;"></div>
<div style="background-color: #ccc;"></div>
<div style="background-color: #666;"></div>
</div>
</body>