代码语言：javascript复制
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<style>
/*ul
{
li
{
width: 100%;
height: 50px;
border: 1px solid red;
font-size: 20px;
background: red;
/*这下面是less的写法:
&:nth-child(5)
{
background:yellow;
}
&:nth-child(6)
{
background:red;
}
&:nth-child(7)
{
background:blue;
}
&:nth-child(8)
{
background:black;
}
}
}
*/
/*less编译后的css文件*/
/*
ul li {
width: 100%;
height: 50px;
border: 1px solid red;
font-size: 20px;
background: red;
}
ul li:nth-child(5) {
background: yellow;
}
ul li:nth-child(6) {
background: red;
}
ul li:nth-child(7) {
background: blue;
}
ul li:nth-child(8) {
background: black;
}
*/
/*ul{
li{
width: 100%;
height: 50px;
border: 1px solid #000;
font-size: 20px;
color: #fff;
background: red;
@for $i from 5 through 8
{
$i:5;
&:nth-child(#{$i})
{
background: red;
}
$i:$i 1;
}
}}*/
/*编译后的css文件*/
/*
ul li {
width: 100%;
height: 50px;
border: 1px solid #000;
font-size: 20px;
color: #fff;
background: red;
}
ul li:nth-child(5) {
background: red;
}
ul li:nth-child(5) {
background: red;
}
ul li:nth-child(5) {
background: red;
}
ul li:nth-child(5) {
background: red;
}
*/
/*ul{
li{
width: 100%;
height: 50px;
border: 1px solid #000;
font-size: 20px;
color: #fff;
background: red;
@for $i from 5 to 8
{
$i:5;
&:nth-child(#{$i})
{
background: red;
}
$i:$i 1;
}
}}*/
/*编译后的css文件*/
/*
ul li {
width: 100%;
height: 50px;
border: 1px solid #000;
font-size: 20px;
color: #fff;
background: red;
}
ul li:nth-child(5) {
background: red;
}
ul li:nth-child(5) {
background: red;
}
ul li:nth-child(5) {
background: red;
}
*/
/*ul{
li{
width: 100%;
height: 50px;
border: 1px solid #000;
font-size: 20px;
color: #fff;
background: red;
$i:5;
@while($i<=8)
{
&:nth-child(#{$i})
{
background: red;
}
$i:$i 1;
}
}*/
/*编译后的css文件*/
/*ul li {
width: 100%;
height: 50px;
border: 1px solid #000;
font-size: 20px;
color: #fff;
background: red;
}
ul li:nth-child(5) {
background: red;
}
ul li:nth-child(6) {
background: red;
}
ul li:nth-child(7) {
background: red;
}
ul li:nth-child(8) {
background: red;
}*/
</style>
</head>
<body>
<ul>
<li>1</li>
<li>2</li>
<li>3</li>
<li>4</li>
<li>5</li>
<li>6</li>
<li>7</li>
<li>8</li>
<li>9</li>
<li>10</li>
</ul>
<!--2.for循环
@for $i from 起始整数 through 结束整数{}
@for $i from 起始整数 to 结束整数{}
两者的区别 through包头包尾, to包头不包尾
3.while循环
@while(条件语句){}
*/-->
</body>
</html>
