In CSS3, the content attribute is used in conjunction with the ":before" and ":after" pseudo-elements to insert content before and after the element. The syntax is "element:before{content:"inserted content" ;}" and "Element:after{content:"Inserted content";}".
The operating environment of this tutorial: Windows 10 system, CSS3&&HTML5 version, Dell G3 computer.
What is the usage of content in css3
The content attribute is used in conjunction with the :before and :after pseudo-elements to insert content.
The syntax is as follows:
content: normal|none|counter|attr|string|open-quote|close-quote|no-open-quote|no-close-quote|url|initial|inherit;
Among them:
<html>
<head>
<meta charset="utf-8">
<title>123</title>
<style>
p:before {
content:"好好学习，";
}
</style>
</head>
<body>
<p>天天向上</p>
</body>
</html>
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