HTMLInputElement: required property
Baseline Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
The required
property of the HTMLInputElement
interface specifies that the user must fill in a value before submitting a form. It reflects the <input>
element's required
attribute.
While the HTML boolean required
attribute is ignored if the type is hidden
, range
, color
, submit
, reset
, button
, and image
, the required
property is true
for these input types if the attribute is present, false
otherwise.
If a required input doesn't have a value, the ValidityState
object's read-only valueMissing
property will be true.
Value
A boolean.
Examples
const inputElement = document.getElementById("name");
console.log(inputElement.required);
inputElement.required = true;
Specifications
Specification |
---|
HTML # dom-input-required |
Browser compatibility
Report problems with this compatibility data on GitHubdesktop | mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
required |
Legend
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- Full support
- Full support
See also
<input>
HTMLInputElement.validity
:required
pseudo-class