css content之counter-reset、content-increment

css content之counter-reset、content-increment - Canrz

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Release： 2016-05-21 08:35:13

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万万没想到，写了快三年前端，有不会用的css，居然还有完全没听过、见过的css属性，而且还是CSS2的内容！

关于counter-reset、content-increment两个属性的详解可以参看张鑫旭的博文：《CSS计数器(序列数字字符自动递增)详解》，这里做个记录，写个demo

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>content-increment</title>
<style>
.test li {margin:16px 0;padding:0;list-style:none;}
.test li li:before{color:#f00;font-family:'Microsoft YaHei';}

.counter1 li{counter-increment:testname;}
.counter1 li:before{content:counter(testname)".";}

.counter2 li{counter-increment:testname2 2;}
.counter2 li:before{content:counter(testname2)"/";}

.counter3 li{counter-increment:testname3 -1;}
.counter3 li:before{content:counter(testname3)")";}

.counter4 li{counter-increment:testname4;}
.counter4 li:before{content:counter(testname4, upper-roman)". ";}

.counter5 {counter-reset:testname5;}
.counter5 li:before{content: counters(testname5, '-') '. '; counter-increment: testname5;color:blue;font-family: 'Microsoft YaHei';}
</style>
</head>
<body>
<ul class="test">
	<li class="counter1">
		<strong>默认时的计数器：</strong>
		<ul>
			<li>列表项</li>
			<li>列表项</li>
			<li>列表项</li>
		</ul>
	</li>
	<li class="counter2">
		<strong>修改计数器每次增加的值为2：</strong>
		<ul>
			<li>列表项</li>
			<li>列表项</li>
			<li>列表项</li>
		</ul>
	</li>
	<li class="counter3">
		<strong>修改计数器每次增加的值为-1：</strong>
		<ul>
			<li>列表项</li>
			<li>列表项</li>
			<li>列表项</li>
		</ul>
	</li>
	<li class="counter4">
		<strong>修改计数器以罗马字符显示：</strong>
		<ul>
			<li>列表项</li>
			<li>列表项</li>
			<li>列表项</li>
		</ul>
	</li>
</ul>

<ul class="test counter5">
	<strong>计数器以嵌套计数显示:</strong>
	<li>父级</li>
	<li>父级
		<ul class="counter5">
			<li>子级1</li>
			<li>子级2</li>
			<li>子级3</li>
		</ul>
	</li>
	<li>父级
		<ul class="counter5">
			<li>子级1</li>
			<li>子级2</li>
			<li>子级3</li>
		</ul>
	</li>
	<li>父级</li>
</ul>

</body>
</html>

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