even
就是偶数的意思;odd
是奇数的意思。
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<link rel="stylesheet" href="divDeepink.css">
<style>
.son{
text-align: center;
width: 100%;
height: 20%;
background-color: aquamarine;
}
.div .son:nth-child(even){
background-color: blue;
}
</style>
</head>
<body>
<div class="div">
<div class="son">1</div>
<div class="son">2</div>
<div class="son">3</div>
<div class="son">4</div>
<div class="son">5</div>
</div>
</body>
</html>