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Editorial Team
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Asked: 2026-05-15T00:47:31+00:00

I have noticed in some site such as http://mashable.com that when you open page

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I have noticed in some site such as http://mashable.com that when you open page and try to scroll it , it appear to load images when you reach it .. i don’t know if it’s a just flicker effect or it’s really done to make less load of images till scrolling to it ?

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1 Answer

  1. Editorial Team

    Here is a script to get you started. You’ll need to do something with the image urls rather than just displaying them, but I’m sure you will figure this out…

    <!DOCTYPE html>
<html>
<head>
  <style type="text/css" >
    div { border: solid 1px black; height:200px; }
  </style>
  <script type="text/javascript" src="http://code.jquery.com/jquery-latest.min.js"></script>
</head>
<body>
    <script type="text/javascript">
        var pixelsBetweenImages = 200;
        var imagesArray = {}
        var imagesArray = new Array(); // regular array (add an optional integer argument to control array's size)
        imagesArray[0] = "";
        imagesArray[1] = "";
        imagesArray[2] = "";
        imagesArray[3] = "/images/ImageThree.gif";
        imagesArray[4] = "/images/ImageFour.gif";
        imagesArray[5] = "/images/ImageFive.gif";
        imagesArray[6] = "/images/ImageSix.gif";
        imagesArray[7] = "/images/ImageSeven.gif";
        imagesArray[8] = "/images/ImageEight.gif";

        $(window).scroll(function() {
            var scrollpos = $(window).scrollTop() + $(window).height();
            var imageIndex = Math.floor(scrollpos / pixelsBetweenImages);
            if (imagesArray[imageIndex] != "") {
                var div = $("#" + imageIndex);
                div.html(imagesArray[imageIndex]);
                imagesArray[imageIndex] = "";
            }

        });
    </script>

    <div>Visible on first load</div>
    <div>Visible on first load</div>
    <div>Visible on first load</div>
    <div id="3">3&nbsp;</div>
    <div id="4">4&nbsp;</div>
    <div id="5">5&nbsp;</div>
    <div id="6">6&nbsp;</div>
    <div id="7">7&nbsp;</div>
    <div id="8">8&nbsp;</div>

</body>
</html>
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