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>
Try it Yourself »
Definition and Usage
The required attribute is a boolean attribute.
When present, it specifies the user is required to select a value before submitting the form.
Browser Support
| Attribute | |||||
|---|---|---|---|---|---|
| required | Yes | 10.0 | Yes | Not supported | Yes |
Differences Between HTML 4.01 and HTML5
The required attribute is new in HTML5.
Differences Between HTML and XHTML
In XHTML, attribute minimization is forbidden, and the required attribute must be defined as <select required="required" />.
Syntax
<select required>