<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>valid伪类选择器</title>
<style>
input[type="email"]:invalid{
color: red;
}
input[type="email"]:valid{
color: greenyellow;
}
</style>
</head>
<body>
<h1>valid伪类选择器</h1>
<form>
邮箱:<input type="email" placeholder="输入邮箱">
</form>
</body>
</html>
运行结果:分享知识,分享快乐!希望中国站在编程之巅!
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