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Is there any difference in spaces between two class selectors in CSS?

一个新手
Release： 2017-09-26 10:03:59
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The difference between two class selectors in css is whether there are spaces or not:

##

<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
		<style>
			.p1.p2{width: 100px;height: 100px;background: red;}/*多类选择器*/
			.p1 .p2{width: 100px;height: 100px;background: yellow;}/*后代选择器*/
		</style>
	</head>
	<body>
		<p class="p1 p2"></p>
		<p class="p1">
		    <p class="p2"></p>	
		</p>	
	</body>
</html>
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Conclusion: There is no space between two class selectors in cssForm Multi-class selector , has spaces to form a descendant selector .

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