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wikiHow Style Popup

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In this tutorial I will show you how to create a wikiHow style popup for your website. With just few lines of CSS and JavaScript you can create such kind of styles.

View Demo

When to Display?

wikiHow displays the popup after user has scrolled 85% of the webpage. Using this JavaScript snippet you can easily detect when user has scrolled 85% of the webpage

window.addEventListener("scroll", function(){
                var heightOfWindow = window.innerHeight;
                var contentScrolled = window.pageYOffset;
                var bodyHeight = window.document.getElementsByTagName("body")[0].offsetHeight;
                var total = bodyHeight - heightOfWindow;
                var got = contentScrolled;
                var scrolled = parseInt((got/total) * 100);
               
                if(scrolled > 85)
                {
                    //display popup
                }
            }, false);

To understand how the above code words please refer this article.

Styling the box

The popup box is displayed as fixed position. We get the balloon shape by making the border top left, top right and bottom left assigned to same pixel value but greater than zero. Border top right is assigned to 0px.

Here is the complete code of the demo.

<!doctype html>
<html>
    <head>
        <title>wikiHow Style Popup</title>
        <style>
            .popup-cover
            {
                right: -250px;
                bottom: -250px;
                position: fixed;
                margin-left: -10px;
                width: 250px;
                -webkit-transition: all 1s;
                -moz-transition: all 1s;
                -o-transition: all 1s;
                transition: all 1s;
            }
           
            .popup
            {
                background-color: white;
                border: 5px solid #93b874;
                border-right: none;
                border-bottom: none;
                border-radius: 150px 150px 0px 150px;
                height: 160px;
                margin-bottom: 0px;
                padding: 40px;
                text-align: center;
                clear: both;
            }
           
            .popup .close
            {
                font-size: 14px;
                position: relative;
                float: right;
                text-decoration: none;
            }
        </style>
    </head>
    <body>
        <div id="popup-cover" class="popup-cover">
            <div class="popup">
                <a class="close" href="javascript:popup_close();">&#10006;</a>
                <h3>QNimate</h3>
            </div>
        </div>
       
        <script>
            window.addEventListener("scroll", function(){
                var heightOfWindow = window.innerHeight;
                var contentScrolled = window.pageYOffset;
                var bodyHeight = window.document.getElementsByTagName("body")[0].offsetHeight;
                var total = bodyHeight - heightOfWindow;
                var got = contentScrolled;
                var scrolled = parseInt((got/total) * 100);
               
                if(scrolled > 85)
                {
                    document.getElementById("popup-cover").style.right = "0px";
                    document.getElementById("popup-cover").style.bottom = "-10px";
                }
                else
                {
                    document.getElementById("popup-cover").style.right = "-250px";
                    document.getElementById("popup-cover").style.bottom = "-250px";
                }
            }, false);

            function popup_close()
            {
                document.getElementById("popup-cover").style.right = "-250px";
                document.getElementById("popup-cover").style.bottom = "-250px";
                setTimeout(function(){document.getElementById("popup-cover").style.display = "none";}, 1000);
            }
        </script>
    </body>
</html>
Narayan Prusty
Database Design for AnalyticsLogin User into WordPress without Password

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Narayan Prusty

I am a full-stack web developer. I specialize in Blockchain and JavaScript. This is my personal blog where I write about programming and technologies that I learn and feel interesting to share.

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