HTML required Attribute
Definition and Usage
The required attribute is a boolean attribute.
When present, it specifies that the element must be filled out before submitting the form.
Applies to
The required attribute can be used on the following elements:
| Elements | Attribute |
|---|---|
| <input> | required |
| <select> | required |
| <textarea> | required |
Examples
Input Example
An HTML form with a required input field:
<form action="/action_page.php">
Username: <input type="text" name="usrname" required>
<input type="submit">
</form>
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Select Example
An HTML form with a required drop-down list:
<select required>
<option value="">None</option>
<option value="volvo">Volvo</option>
<option value="saab">Saab</option>
<option value="mercedes">Mercedes</option>
<option value="audi">Audi</option>
</select>
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Textarea Example
A form with a required text area:
<form action="/action_page.php">
<textarea name="comment" required></textarea>
<input type="submit">
</form>
Try it Yourself »
Browser Support
The required attribute has the following browser support for each element:
| Element | |||||
|---|---|---|---|---|---|
| input | 5.0 | 10.0 | 4.0 | Not supported | 9.6 |
| select | Yes | 10.0 | Yes | Not supported | Yes |
| textarea | 5.0 | 10.0 | 4.0 | Not supported | Yes |
