How to Add Pure Javascript Smooth Back To Top Button To Your Blogger Blog

  In this Article I'm writing a detail tutorial on How to Add Smooth Back To Top Button only using JavaScript no Jquery required . It is very simple to do with just a few lines of code.View the demo to see it in action.

So here’s a tutorial of how to implement a smooth scrolling  back to top button only using JavaScript on your Blogger  blog.

Step-1

Go to Blogger Dashboard >> Template >> Edit HTML
In the code editor find for </b:skin> and put below CSS file to above </b:skin>

CSS

#scrolltotop {
        text-align: center
    }
    
    #scrolltotop {
        position: fixed;
        opacity: 0;
        visibility: hidden;
        overflow: hidden;
        z-index: 99999999;
        background-color: rgba(232, 98, 86, 0.8);
        color: #eee;
        font-size: 22px;
        font-weight: bolder;
        line-height: 60px;
        height: 60px;
        width: 60px;
        right: 30px;
        bottom: 30px;
        padding-top: 2px;
        box-shadow: 0 0 10px rgba(0, 0, 0, 0.05);
        -webkit-transition: all .5s ease-in-out;
        -moz-transition: all .5s ease-in-out;
        -ms-transition: all .5s ease-in-out;
        -o-transition: all .5s ease-in-out;
        transition: all .5s ease-in-out;
        border-radius: 50%;
    }
    
    #scrolltotop:hover {
        background-color: #888;
        opacity: 1 !important;
    }
    
    #scrolltotop.show {
        visibility: visible;
        cursor: pointer;
        opacity: 1
    }
    
    #scrolltotop.show-out {
        visibility: visible;
        cursor: pointer;
        opacity: .5;
    }

Step-2

Find </body> tag and put these html code.

HTML

<div id="scrolltotop"><span>&#8679;</span></div>

You can also change Arrow ⇧ using HTML entities: Here you'll find some HTML arrow codes, arrow characters and entities

Step-3

Have you pasted HTML code now paste the script function below html tag you have pasted in step-2 and above which </body> tag

JAVASCRIPT

 <script type="text/javascript">
//<![CDATA[
    window.addEventListener("load", function() {
        scrollTo = function(element, to, duration) {
            var start = element.scrollTop,
                change = to - element.scrollTop,
                currentTime = 0,
                increment = 20;

            var animateScroll = function() {
                currentTime += increment;
                var val = Math.easeInOutQuint(currentTime, start, change, duration);
                element.scrollTop = val;
                if (currentTime < duration) {
                    setTimeout(animateScroll, increment);
                }
            };
            animateScroll();
        };
        var toptoback = document.getElementById("scrolltotop");
        document.addEventListener('scroll', function() {
            (document.body.scrollTop > 100) ? toptoback.className = 'show': toptoback.className = '';
            if (document.body.scrollTop > 1000) {
                toptoback.className = 'show-out';
            }
        });
        toptoback.addEventListener('click', function() {
            scrollTo(document.body, 0, 3000)
        });

        Math.easeInOutQuint = function(t, b, c, d) {
            if ((t /= d / 2) < 1) return c / 2 * t * t * t * t * t + b;
            return c / 2 * ((t -= 2) * t * t * t * t + 2) + b;
        };
    });
//]]>
</script>

The Arrow I am using is HTML entity so make sure that tags have in your blogger template after opening tag.