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invalid

The invalid event is fired when a submittable element has been checked and doesn't satisfy its constraints. The validity of submittable elements is checked before submitting their owner form, or after the checkValidity() of the element or its owner form is called.

General info

Specification: HTML5
Interface: Event
Bubbles: No
Cancelable: Yes
Target: Element
Default Action: Varies (can prevent a form to be submitted).

Properties

Property	Type	Description
`target` Read only	`EventTarget`	The event target (the topmost target in the DOM tree).
`type` Read only	`DOMString`	The type of event.
`bubbles` Read only	`Boolean`	Whether the event normally bubbles or not.
`cancelable` Read only	`Boolean`	Whether the event is cancellable or not.

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https://developer.mozilla.org/en-US/docs/Web/Events/invalid