244 lines
5.7 KiB
HTML
244 lines
5.7 KiB
HTML
<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8" />
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<meta http-equiv="X-UA-Compatible" content="IE=edge" />
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<title>Scrollama Demo: Fixed JS</title>
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<meta name="description" content="Scrollama Demo: Fixed JS" />
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<meta name="viewport" content="width=device-width, initial-scale=1" />
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<style>
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/* default / demo page */
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* {
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box-sizing: border-box;
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}
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html,
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body {
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margin: 0;
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padding: 0;
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font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
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Oxygen, Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;
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}
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body {
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min-height: 1280px;
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font-weight: 300;
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color: #2a2a2a;
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}
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p,
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h1,
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h2,
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h3,
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h4,
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a {
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margin: 0;
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font-weight: 300;
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}
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a,
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a:visited,
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a:hover {
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color: #f30;
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text-decoration: none;
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border-bottom: 1px solid currentColor;
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}
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#intro {
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max-width: 40rem;
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margin: 1rem auto;
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text-align: center;
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}
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.intro__overline {
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font-size: 1.4rem;
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}
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.intro__hed {
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font-size: 1.4rem;
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margin: 1.5rem auto;
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text-transform: uppercase;
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font-weight: 900;
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letter-spacing: 0.05em;
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}
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.intro__dek {
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font-size: 1.4rem;
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}
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/* demo */
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#intro {
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margin-bottom: 320px;
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}
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#outro {
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height: 1200px;
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}
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/* scrollama */
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#scroll {
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position: relative;
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border-top: 2px dashed #000;
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border-bottom: 2px dashed #000;
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display: -webkit-box;
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display: -ms-flexbox;
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display: flex;
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}
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figure {
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position: sticky;
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width: 100%;
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top: 0;
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right: 2rem;
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-webkit-transform: translate3d(0, 0, 0);
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-moz-transform: translate3d(0, 0, 0);
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transform: translate3d(0, 0, 0);
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background-color: #ddd;
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border: 1px solid #000;
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}
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article p {
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text-align: center;
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padding: 1rem;
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position: absolute;
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top: 50%;
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left: 50%;
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-moz-transform: translate(-50%, -50%);
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-webkit-transform: translate(-50%, -50%);
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transform: translate(-50%, -50%);
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font-size: 8rem;
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font-weight: 900;
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color: #666;
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}
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article {
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position: relative;
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padding: 0 1rem;
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width: 30rem;
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}
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.step {
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margin: 0 auto 2rem auto;
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border: 1px solid #333;
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position: relative;
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/* border-bottom: none; */
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}
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.step:last-child {
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border-bottom: 1px solid #333;
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}
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.step.is-active {
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background-color: lightgoldenrodyellow;
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}
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.step p {
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text-align: center;
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padding: 1rem;
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font-size: 1.5rem;
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}
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</style>
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</head>
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<body>
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<section id="intro">
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<p class="intro__overline">
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<a href="https://github.com/russellgoldenberg/scrollama"
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>scrollama.js</a
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>
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</p>
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<h1 class="intro__hed">Demo: Sticky Graphic Position</h1>
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<p class="intro__dek">
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Start scrolling to see how it works.
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</p>
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</section>
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<section id="scroll">
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<article>
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<div class="step" data-step="1">
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<p>STEP 1</p>
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</div>
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<div class="step" data-step="2">
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<p>STEP 2</p>
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</div>
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<div class="step" data-step="3">
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<p>STEP 3</p>
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</div>
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<div class="step" data-step="4">
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<p>STEP 4</p>
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</div>
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</article>
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<figure>
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<p>0</p>
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</figure>
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</section>
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<section id="outro"></section>
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<script src="d3.v4.min.js"></script>
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<script src="https://unpkg.com/intersection-observer"></script>
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<script src="../build/scrollama.js"></script>
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<script>
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// using d3 for convenience
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var container = d3.select("#scroll");
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var figure = container.select("figure");
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var article = container.select("article");
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var step = article.selectAll(".step");
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// initialize the scrollama
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var scroller = scrollama();
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// generic window resize listener event
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function handleResize() {
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// 1. update height of step elements
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var stepHeight = Math.floor(window.innerHeight * 0.75);
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step.style("height", stepHeight + "px");
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// 2. update width/height of graphic element
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var bodyWidth = d3.select("body").node().offsetWidth;
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var figureHeight = Math.floor(window.innerHeight * 0.5);
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figure.style("height", figureHeight + "px");
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// 3. tell scrollama to update new element dimensions
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scroller.resize();
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}
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// scrollama event handlers
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function handleStepEnter(response) {
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console.log(response);
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// response = { element, direction, index }
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// add color to current step only
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step.classed("is-active", function(d, i) {
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return i === response.index;
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});
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// update graphic based on step
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figure.select("p").text(response.index + 1);
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}
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function init() {
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// 1. force a resize on load to ensure proper dimensions are sent to scrollama
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handleResize();
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// 2. setup the scroller passing options
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// this will also initialize trigger observations
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// 3. bind scrollama event handlers (this can be chained like below)
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scroller
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.setup({
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step: "article .step",
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debug: true,
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offset: 0.75
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})
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.onStepEnter(handleStepEnter);
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// setup resize event
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window.addEventListener("resize", handleResize);
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}
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// kick things off
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init();
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</script>
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</body>
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</html>
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