scrollama
Version:
Lightweight scrollytelling library using IntersectionObserver
143 lines (127 loc) • 4.57 kB
HTML
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<title>Scrollama: Basic Example</title>
<meta name="description" content="Scrollama: Basic Example">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel='stylesheet' href='../style.css'>
<style>
#scrolly {
position: relative;
}
article {
position: relative;
padding: 0 1rem;
margin: 0 auto;
width: 33%;
}
.step {
margin: 2rem auto 4rem auto;
background-color: #3b3b3b;
color: #fff;
}
.step.is-active {
background-color: goldenrod;
color: #3b3b3b;
}
.step p {
text-align: center;
padding: 1rem;
font-size: 1.5rem;
}
</style>
</head>
<body>
<a href="https://github.com/russellgoldenberg/scrollama" target="_blank" class="github-corner" aria-label="View source on GitHub"><svg width="80" height="80"
viewBox="0 0 250 250" style="fill:#151513; color:#fff; position: absolute; top: 0; border: 0; right: 0;"
aria-hidden="true">
<path d="M0,0 L115,115 L130,115 L142,142 L250,250 L250,0 Z"></path>
<path
d="M128.3,109.0 C113.8,99.7 119.0,89.6 119.0,89.6 C122.0,82.7 120.5,78.6 120.5,78.6 C119.2,72.0 123.4,76.3 123.4,76.3 C127.3,80.9 125.5,87.3 125.5,87.3 C122.9,97.6 130.6,101.9 134.4,103.2"
fill="currentColor" style="transform-origin: 130px 106px;" class="octo-arm"></path>
<path
d="M115.0,115.0 C114.9,115.1 118.7,116.5 119.8,115.4 L133.7,101.6 C136.9,99.2 139.9,98.4 142.2,98.6 C133.8,88.0 127.5,74.4 143.8,58.0 C148.5,53.4 154.0,51.2 159.7,51.0 C160.3,49.4 163.2,43.6 171.4,40.1 C171.4,40.1 176.1,42.5 178.8,56.2 C183.1,58.6 187.2,61.8 190.9,65.4 C194.5,69.0 197.7,73.2 200.1,77.6 C213.8,80.2 216.3,84.9 216.3,84.9 C212.7,93.1 206.9,96.0 205.4,96.6 C205.1,102.4 203.0,107.8 198.3,112.5 C181.9,128.9 168.3,122.5 157.7,114.1 C157.9,116.9 156.7,120.9 152.7,124.9 L141.0,136.5 C139.8,137.7 141.6,141.9 141.8,141.8 Z"
fill="currentColor" class="octo-body"></path>
</svg></a>
<main>
<nav>
<a href='https://github.com/russellgoldenberg/scrollama'>scrollama.js</a>
<div class='nav__examples'>
<p>Examples:</p>
<a href='https://russellgoldenberg.github.io/scrollama/basic'>Basic</a>
<a href='https://russellgoldenberg.github.io/scrollama/progress'>Progress</a>
<a href='https://russellgoldenberg.github.io/scrollama/sticky-side'>Sticky Side</a>
<a href='https://russellgoldenberg.github.io/scrollama/sticky-overlay'>Sticky Overlay</a>
</div>
</nav>
<section id='intro'>
<h1 class='intro__hed'>Basic Example</h1>
<p class='intro__dek'>
Start scrolling to see how it works.
</p>
</section>
<section id='scrolly'>
<article>
<div class='step' data-step='1'>
<p>STEP 1</p>
</div>
<div class='step' data-step='2'>
<p>STEP 2</p>
</div>
<div class='step' data-step='3'>
<p>STEP 3</p>
</div>
<div class='step' data-step='4'>
<p>STEP 4</p>
</div>
</article>
</section>
<section id='outro'></section>
</main>
<script src='https://unpkg.com/intersection-observer@0.5.0/intersection-observer.js'></script>
<script src='../scrollama.min.js'></script>
<script>
var scrolly = document.querySelector('#scrolly');
var article = scrolly.querySelector('article');
var step = article.querySelectorAll('.step');
// initialize the scrollama
var scroller = scrollama();
// scrollama event handlers
function handleStepEnter(response) {
// response = { element, direction, index }
console.log(response);
// add to color to current step
response.element.classList.add('is-active');
}
function handleStepExit(response) {
// response = { element, direction, index }
console.log(response);
// remove color from current step
response.element.classList.remove('is-active');
}
function init() {
// set random padding for different step heights (not required)
step.forEach(function (step) {
var v = 100 + Math.floor(Math.random() * window.innerHeight / 4);
step.style.padding = v + 'px 0px';
});
// 1. setup the scroller with the bare-bones options
// this will also initialize trigger observations
// 2. bind scrollama event handlers (this can be chained like below)
scroller.setup({
step: '#scrolly article .step',
debug: true,
offset: 0.5
})
.onStepEnter(handleStepEnter)
.onStepExit(handleStepExit);
// 3. setup resize event
window.addEventListener('resize', scroller.resize);
}
// kick things off
init();
</script>
</body>
</html>