xxxxxxxxxx1
<section id="topSection" class="blue"></section>2
<section class="red"></section>3
<section class="yellow"></section>4
<section class="green"></section>5
6
<div id="btnTop" class="fixed-action-btn smooth-scroll" style="bottom: 45px; right: 24px;display: none;">7
<a href="#topSection" class="btn-floating btn-large red">8
<i class="fa fa-arrow-up"></i>9
</a>10
</div>xxxxxxxxxx1
section {2
min-height:100vh; 3
}xxxxxxxxxx1
$(function() {2
3
var $btn = $('#btnTop');4
var $home = $('#topSection');5
var startpoint = $home.scrollTop() + $home.height();6
7
$(window).on('scroll', function() {8
if($(window).scrollTop() > startpoint) {9
$btn.show();10
} else {11
$btn.hide();12
}13
});14
}); Console errors: 0