CloseTag | الشروحات | CSS | تحديد العناصر عن طريق الحالة في لغة CSS | CSS Pseudo Classes

<!DOCTYPE html>
<html>
<head>
<style>
input:invalid {
  border: 2px solid red;
}
</style>
</head>
<body>

<h3>A demonstration of the :invalid selector.</h3>

<input type="email" value="supportEmail">

<p>Try typing a legal e-mail address, to see the styling disappear.</p>

<p><strong>Note</strong>: The :invalid selector is not supported in Internet Explorer 9 and earlier versions.</p>

</body>
</html>

A demonstration of the :invalid selector.

Try typing a legal e-mail address, to see the styling disappear.

Note: The :invalid selector is not supported in Internet Explorer 9 and earlier versions.