HTML <select> requiredAttribute
Example
An HTML form with a required drop-down list:
<form action="demo_form.html">
<select required>
<option value="volvo">Volvo</option>
<option value="saab">Saab</option>
<option value="mercedes">Mercedes</option>
<option value="audi">Audi</option>
</select>
<input type="submit">
</form>
<select required>
<option value="volvo">Volvo</option>
<option value="saab">Saab</option>
<option value="mercedes">Mercedes</option>
<option value="audi">Audi</option>
</select>
<input type="submit">
</form>
Try it yourself »
Browser support
Almost all main browsers do not support the required attribute.
Definition and usage
The required attribute is a boolean attribute.
The required attribute specifies that the user must select a value before submitting the form.
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>
HTML <select> tag Other extensions