examples/carousel-image-lazy-loading.html

<html>
<head>
    <style>
        .carousel-panel {
            width: 400px;
            height: 200px;
            opacity: 0;
            visibility: hidden;
            position: absolute;
        }

        .carousel-panel img {
            display: block;
            width: 100%;
            height: auto;
        }

        .carousel-panel-active {
            opacity: 1;
            visibility: visible;
            transition: opacity .2s ease-out;
        }

        .carousel-thumb {
            width: 20px;
            height: 20px;
            background-color: darkblue;
            display: inline-block;
            cursor: pointer;
        }

        .image-loading {
            /* add image loader indicator styles here */
        }

    </style>
</head>
<body>
<p>Click on one of the thumbnails below and notice how the images only load when <br />
    you click on a thumbnail image. The first photo loads immediately fyi.</p>
<div class="carousel-thumbs">
    <div class="carousel-thumb"></div>
    <div class="carousel-thumb"></div>
    <div class="carousel-thumb"></div>
</div>
<div class="carousel">
    <div class="carousel-panel">
        <img data-lazy-src="http://www.gstatic.com/webp/gallery/1.jpg" src="" />
    </div>
    <div class="carousel-panel">
        <img data-lazy-src="http://www.gstatic.com/webp/gallery/2.jpg" src="" />
    </div>
    <div class="carousel-panel">
        <img data-lazy-src="http://www.gstatic.com/webp/gallery/3.jpg" src="" />
    </div>

</div>
<script src="../dist/carousel.js"></script>
<script>
    var carousel = new Carousel({
        panels: document.getElementsByClassName('carousel-panel'),
        panelActiveClass: 'carousel-panel-active',
        lazyLoadAttr: 'data-lazy-src',
        assetLoadingClass: 'image-loading',
        thumbnails: document.getElementsByClassName('carousel-thumb')
    });

    // goes to first panel and lazy loads the image inside of it
    carousel.goTo(0);
    // FYI: it will also add the "image-loading" css class to the image element while its loading
    // so you can add a loading style, loading indicator, etc

</script>
</body>
</html>