【CSS】:nth-child和:nth-of-type
:nth-child，先根据条件再查找类名，如下例中，先查找奇数元素再满足div
<!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>
div:nth-child(2n+1) {
background: #f81;
}
</style>
</head>
<body>
<div>1 - div1</div>
<span>2 - span1</span>
<div>3 - div2</div>
<div>4 - div3</div>
<span>5 - span2</span>
<div>6 - div4</div>
</body>
</html>
所以样式如下：
:nth-of-type，先查找类名再查询符合条件的，如下例中，先查找div再满足是奇数div
<!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>
div:nth-of-type(2n+1) {
background: #f81;
}
</style>
</head>
<body>
<div>1 - div1</div>
<span>2 - span1</span>
<div>3 - div2</div>
<div>4 - div3</div>
<span>5 - span2</span>
<div>6 - div4</div>
</body>
</html>
所以样式如下：
