<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
<style>
div{
display: flex;/*显示模式设置为弹性盒子*/
flex-wrap: wrap;/*进行强制换行*/
}
div:after{
/*对最后一个伪元素进行最大限度伸缩*/
content: ' ';
flex-grow: 999999999999999999999999999999999999;
}
img{
height: 200px;/*高度*/
width: auto;
margin: 2px;
flex-grow: 1;/*进行按比例伸缩*/
object-fit: cover;/*进行裁切，并且图片按比例缩放*/
}</style>
</head>
<body>
<div>
<img src="./1.jpg"/>
<img src="./2.jpg"/>
<img src="./3.jpg"/>
<img src="./4.jpg"/><img src="./9.jpg"/>
<img src="./5.jpg"/><img src="./10.jpg"/>
<img src="./6.jpg"/><img src="./11.jpg"/>
<img src="./7.jpg"/><img src="./12.jpg"/>
<img src="./8.jpg"/>
<div>
</body>
</html>