스크롤(Scroll) 화면 맨위로, 맨아래로 > 공책

//html
<a id="top_btn"><i class="fa-solid fa-chevron-up"></i></a>
<a id="bottom_btn"><i class="fa-solid fa-chevron-down"></i></a>


//script
$("#top_btn").on("click", function() {
	$("html, body").animate({scrollTop:0}, '500');
	return false;
});

$('#bottom_btn').click(function(){
	var bottom = document.body.scrollHeight;
	window.scrollTo({top:bottom, left:0, behavior:'smooth'})
});