HTML <input> required Attribute

HTML <img>

HTML <ins>

The required attribute on an <input> tag specifies that data must be provided before submitting the form.

This attribute is part of the HTML built-in validation functions.

Example

#

A required attribute on two <input> elements.
Both text fields must have values before the form can be submitted.

<form action="/tutorial/action.html">
  <label for="firstname">*First name</label><br/>
  <input type="text" id="firstname" name="firstname" required><br />
  <label for="lastname">*Last name</label><br/>
  <input type="text" id="lastname" name="lastname" required><br /><br />

  <input type="submit">
</form>

Using required

#

The required attribute specifies that an <input> element must have a value before submitting the form. If not, an error message appears.

This attribute is part of the built-in validation functionality in HTML.

The required attribute only applies to these input types: