2018/temporal/value-as-date.html

<!doctype html>

<input id=my-date type=date>

<input id=test type=button value="test it!">

<script>
void function () {

	const testButton = document.getElementById('test')
	const myDateInput = document.getElementById('my-date')

	myDateInput.oninput = function (e) {
		console.log(myDateInput.value)
		console.log(myDateInput.valueAsDate)
	}

	testButton.onclick = function () {
		const d = myDateInput.valueAsDate
		d.setFullYear(2019)
		console.log(d)
		console.log(myDateInput.valueAsDate)
	}

}()
</script>