javascript [jQuery]平滑滚动到页面顶部

Posted 2021-05-03

//**SCROLL TO TOP
$("footer").append("<hr><a href='#' class='scroll-up'>Back to Top &uarr;</a>");

$(".scroll-up").on("click", function(e) {
	e.preventDefault();
  $("html, body").animate({ scrollTop: 0 }, 720); //the last value is the speed
});