Web/API/HTMLInputElement/invalid event

The invalid event fires when a submittable element has been checked for validity and doesn't satisfy its constraints.

Bubbles	No
Cancelable	Yes
Interface	`Event`
Event handler property	`GlobalEventHandlers.oninvalid`

This event can be useful for displaying a summary of the problems with a form on submission. When a form is submitted, invalid events are fired at each form control that is invalid. The validity of submittable elements is checked before submitting their owner <form>, or after the checkValidity() method of the element or its owner <form> is called.

It is not checked on blur.

Examples

If a form is submitted with an invalid value, the submittable elements are checked and, if an error is found, the invalid event will fire on the invalid element. In this example, when an invalid event fires because of an invalid value in the input, the invalid value is logged.

HTML

<form action="#">
  <ul>
    <li><label>Enter an integer between 1 and 10: <input type="number" min="1" max="10" required></label></li>
    <li><input type="submit" value="submit"></li>
  </ul>
</form><p id="log"></p>

JavaScript

const input = document.querySelector('input')
const log = document.getElementById('log')

input.addEventListener('invalid', logValue)

function logValue(e) {
  log.textContent += e.target.value
}

Result

Specifications

Specification	Status	Comment
HTML Living StandardThe definition of 'Invalid event' in that specification.	Living Standard
HTML 5.1The definition of 'Invalid event' in that specification.	Recommendation
HTML5The definition of 'Invalid event' in that specification.	Recommendation

Browser compatibility

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`invalid` event	Chrome Full support 10	Edge Full support 12	Firefox Full support 4	IE Full support 10	Opera Full support 10	Safari Full support 5	WebView Android Full support 4	Chrome Android Full support 18	Firefox Android Full support 64	Opera Android Full support 12	Safari iOS Full support 5	Samsung Internet Android Full support 4.0

Legend

Full support: Full support