<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<style>
.parent{
height:500px;
border:1px solid #222;
display:flex;/*設爲伸縮容器*/
flex-flow:row;/*伸縮項目單行排列*/
}
.stable{
width:200px;/*固定寬度*/
border:1px solid #ccc;
margin:20px;
}
.change{
flex:1;/*這裏設置爲佔比1，填充滿剩餘空間*/
border:1px solid #ff4400;
margin:20px;
}
</style>
</head>
<body>
<div class="parent">
<div class="stable">stable 固定寬度200px</div>
<div class="change">changeable 可變寬度</div>
</div>
</body>
</html>