HTML <input> vereiste eigenschap

HTML <input> tag

Definitie en gebruik

required Het eigenschap vereist dat de invoervelden worden ingevuld voordat het wordt ingediend.

required Eigenschap is een boolean eigenschap.

If this attribute is used, the field is required (or optional).

Note:required Properties apply to the following input types:

  • text
  • search
  • url
  • tel
  • email
  • password
  • date pickers
  • number
  • checkbox
  • radio
  • file

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

Syntax

<input required>

Browser support

Chrome Edge Firefox Safari Opera
Chrome Edge Firefox Safari Opera
5.0 10.0 4.0 10.1 9.6

Note:required Properties are new properties in HTML5.

HTML <input> tag