HTMLFormElement: checkValidity() method
The checkValidity() method of the HTMLFormElement interface returns a boolean value which indicates if all associated controls meet any constraint validation rules applied to them. The method also fires an invalid event on each invalid element, but not on the form element itself. Because there's no default browser behavior for checkValidity(), canceling this invalid event has no effect.
Syntax
js
checkValidity()
Parameters
None.
Return value
Returns true if the associated controls' values have no validity problems; otherwise, returns false.
Examples
In the following example, calling checkValidity() would return true if or false.
js
const element = document.getElementById("myForm");
console.log(element.checkValidity());