1.首先安装node.js
方法：查看我的博客
2.在npm节点上安装less，命令行为
npm -install -g less
3.创建一个.less文件和.hrml文件
.less
.container{
h1{
font-size: 25px;
color: darkorange;
}
p{
font-size: 25px;
color: cadetblue;
}
.myclass{
h1{
font-size: 25px;
color: cornflowerblue;
}
p{
font-size: 25px;
color: aquamarine;
}
}
}
.class1{
font-size: 30px;
color: cornflowerblue;
}
.class2{
font-size: 100px;
color: aqua;
}<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Test</title>
<link rel="stylesheet" type="text/css" href="style.css">
</head>
<body class="container">
<h1>113144444443</h1>
<p class="myclass">Less 文件学习</p>
<div class="class1 class2">test</div>
</body>
</html>4.运行命令行
lessc style。less style.css
来源https://www.w3cschool.cn/less/less_installation.html