代码
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
.demo-2{
display:flex;
}
.item-left{
flex-basis: 100px;
background: red;
flex-shrink:0;
}
.item-right{
flex-basis: 600px;
background: yellow;
}
</style>
</head>
<body>
<div class="demo-2">
<div class="item-left">
1
</div>
<div class="item-right">
2
</div>
</div>
</body>
</html>
运行结果