:required CSS Pseudo Class
Description
The :required pseudo-class applies style rules to the <input> element that has the required attribute set, it allows you to select the required fields before submitting the form.
Syntax
input:required { ... }
Example
<p>
<label for="user">Username</label><input id="user" type="text" required>
</p>
<p>
<label for="email">E-mail</label><input id="email" type="text" required>
</p>
<p><label for="text">Message</label> <textarea cols="40" rows="10" id="text"></textarea>
</p>
<p>
<label> </label><input type="submit" id="send" value="Submit">
</p>p {
margin: 0 0 5px;
}
label {
display: block;
}
input[type="text"], textarea {
width: 320px;
}
input:required {
border: 2px solid red;
}Browser Support
| Desktop | |||||
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| 10 | 12 | 10 | 4 | 10 | 5 |
| Tablets / Mobile | |||||
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| 4.4.3 | 18 | 4 | 10.1 | 5 | X |