submitter property found on
SubmitEvent interface specifies the submit button or other element
that was invoked to cause the form to be submitted.
An element, indicating the element that sent
submit event to the form. While this
is often an
<input> element whose
submit or a
<button> element whose
submit, it could be some other element which has initiated a
If the submission was not triggered by a button of some kind, the value of
SubmitEvent for example code.
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