CSS Selector - CSS :optional
The :optional selector selects form elements with no required attribute.
The :optional selector only applies to the form
elements: input, select and textarea.
We can use the :required selector to select form elements which are required.
Summary
- CSS Version
- 3
CSS Syntax
:optional {
style properties
}
Browser compatibility
 |
 |
 |
 |
 |
|
|---|---|---|---|---|---|
:optional |
Yes | 10.0 | Yes | Yes | Yes |
Example
<!DOCTYPE html>
<html>
<head>
<style>
input:optional {<!-- ww w . j a v a 2s. com-->
background-color: red;
}
</style>
</head>
<body>
<p>An optional input element:<br><input></p>
<p>A required input element:<br><input required></p>
</body>
</html>