You can use the ":nth-of-type()" selector to select the even columns of li in html, and the syntax is "li:nth-of-type(even){}". The ":nth-of-type(n)" selector matches child elements of a specific type of the parent element. When the value is even, it means matching elements with an even number.
The operating environment of this tutorial: Windows 7 system, CSS3&&HTML5 version, Dell G3 computer.
You can use li:nth-of-type(even) {......} to select the even columns of li
Example:
<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8" />
<title></title>
<style>
#Ulist li:nth-of-type(even) {
background: royalblue;
}
</style>
</head>
<body>
<ul id="Ulist">
<li>1</li>
<li>2</li>
<li>3</li>
<li>4</li>
<li>5</li>
<li>6</li>
</ul>
</body>
</html>Effect:
Recommended learning: html video tutorial
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