Baseline Widely available
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.
Note: The :valid and :invalid CSS pseudo-classes are applied to <form> elements based on the validity of its owned form controls, not the validity of the <form> element itself.
None.
Return valueReturns true if the associated controls' values have no validity problems; otherwise, returns false.
In the following example, calling checkValidity() would return true if or false.
const element = document.getElementById("myForm");
console.log(element.checkValidity());
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