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 Standard The definition of 'Invalid event' in that specification. |
Living Standard | |
HTML 5.1 The definition of 'Invalid event' in that specification. |
Recommendation | |
HTML5 The definition of 'Invalid event' in that specification. |
Recommendation |
Browser compatibility
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
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