Some sites place a smooth-scrolling, back-to-top button in the lower, right-hand corner of the site so the user can get back to the page top easily.

This can be done using three things:

• A block of HTML code to represent the back-to-top button
• Some CSS to make it look nice
• A block of jQuery code to make it smoothly scroll back to the top of the page

Place the following code just before the closing body tag of your site.

<!-- custom back to top button -->
<a href="#" id="back-to-top" title="Back to top"><i class="fas fa-chevron-up"></i></a>

Then, in your CSS styles, place the following. This will give the button a nice look while adding to the functionality.

/* custom back to top button */
#back-to-top {
    position: fixed;
    bottom: 40px;
    right: 24px;
    z-index: 9999;
    width: 54px;
    height: 54px;
    text-align: center;
    line-height: 48px;
    background: #225588;
    font-size: 25px;
    color: #ffffff;
    cursor: pointer;
    border: #ffffff solid thin;
    border-radius: 6px;
    text-decoration: none;
    transition: all 0.4s;
    opacity: 0;
}
#back-to-top:hover {
    background: #2c353d;
}
#back-to-top.show {
    opacity: 1;
}

Finally, place the following in your JavaScript page. this gives the button its functionality.

• Line 3 is the number of pixels the user must have scrolled down the page before the button will first appear
• Line 20 is the speed in ms for how quickly the button will scroll back to the top of the page

// custom back to top button
if ($('#back-to-top').length) {
    var scrollTrigger = 100, // px
        backToTop = function () {
            var scrollTop = $(window).scrollTop();
            if (scrollTop > scrollTrigger) {
                $('#back-to-top').addClass('show');
            } else {
                $('#back-to-top').removeClass('show');
            }
        };
    backToTop();
    $(window).on('scroll', function () {
        backToTop();
    });
    $('#back-to-top').on('click', function (e) {
        e.preventDefault();
        $('html,body').animate({
            scrollTop: 0
        }, 700);
    });
}

To see this in action, look to the bottom, right corner of this site for the working button.

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