<html>
<a href="#" class="gotop">
<!--gotopicon-->
</a>
</html>
點擊向上滾動按鈕，執行向上滾動。
<script>
function goTop(e) {
e.preventDefault();
if (e.target.offsetParent.classList.value == 'gotop') {
document.body.scrollTop = 0; // For Safari
document.documentElement.scrollTop = 0; // For Chrome, Firefox, IE and Opera
}
}
body.addEventListener('click', goTop);
</script>
scroll to top
$(document).ready(function () {
$(window).scroll(function (e) {
var scrollY = window.scrollY;
if (scrollY < 500) {
$('.top-btn').addClass('show');
} else{
$('.top-btn').removeClass('show');
}
$('.top-btn').click(function(){
$('html,body').animate({
scrollTop: 0
},1000);
});
});
