Try:
$('#profileform')[0].checkValidity()
When you select $('#profileform') you get a jQuery object array. To access actual DOM properties you must select the first item in the array, which is the raw DOM element.
Try:
$('#profileform')[0].checkValidity()
When you select $('#profileform') you get a jQuery object array. To access actual DOM properties you must select the first item in the array, which is the raw DOM element.