Test checkValidity correctness on input select and textarea element after cloning node . On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". PASS input.checkValidity() is true PASS clonedInput.checkValidity() is true PASS clonedInputDeep.checkValidity() is true PASS input.checkValidity() is false PASS clonedInputNext.checkValidity() is false PASS select.checkValidity() is true FAIL clonedSelect.checkValidity() should be true. Was false. PASS clonedSelectDeep.checkValidity() is true PASS textarea.checkValidity() is true PASS clonedTextArea.checkValidity() is true PASS clonedTextAreaDeep.checkValidity() is true PASS successfullyParsed is true TEST COMPLETE