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HTML <input> required Attribute

HTML <input> tag

Example

An HTML form with a required input field:

<form action="/action_page.php">
  <label for="username">Username:</label>
  <input type="text" id="username" name="username" required>
  <input type="submit">
</form>
Try it Yourself »

Definition and Usage

The required attribute is a boolean attribute.

When present, it specifies that an input field must be filled out before submitting the form.

Note: The required attribute works with the following input types: text, search, url, tel, email, password, date pickers, number, checkbox, radio, and file.


Browser Support

The numbers in the table specify the first browser version that fully supports the attribute.

Attribute
required 5.0 10.0 4.0 10.1 9.6

Syntax

<input required>

HTML <input> tag