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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Smooth Scroll behavior polyfill</title>
<meta name="viewport" content="width=device-width">
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/normalize/4.1.1/normalize.min.css">
<link href='https://fonts.googleapis.com/css?family=Roboto+Condensed:400,700' rel='stylesheet' type='text/css'>
<!-- rAF polyfill -->
<script>
// http://paulirish.com/2011/requestanimationframe-for-smart-animating/
// http://my.opera.com/emoller/blog/2011/12/20/requestanimationframe-for-smart-er-animating
// requestAnimationFrame polyfill by Erik Möller. fixes from Paul Irish and Tino Zijdel
// MIT license
(function() {
var lastTime = 0;
var vendors = ['ms', 'moz', 'webkit', 'o'];
for(var x = 0; x < vendors.length && !window.requestAnimationFrame; ++x) {
window.requestAnimationFrame = window[vendors[x]+'RequestAnimationFrame'];
window.cancelAnimationFrame = window[vendors[x]+'CancelAnimationFrame']
|| window[vendors[x]+'CancelRequestAnimationFrame'];
}
if (!window.requestAnimationFrame)
window.requestAnimationFrame = function(callback, element) {
var currTime = new Date().getTime();
var timeToCall = Math.max(0, 16 - (currTime - lastTime));
var id = window.setTimeout(function() { callback(currTime + timeToCall); },
timeToCall);
lastTime = currTime + timeToCall;
return id;
};
if (!window.cancelAnimationFrame)
window.cancelAnimationFrame = function(id) {
clearTimeout(id);
};
}());
</script>
<!-- smooth scroll behavior polyfill -->
<script src="src/smoothscroll.js"></script>
<!-- site styles -->
<style>
body {
background-color: #fefefe;
color: #212121;
font-family: 'Roboto Condensed', Arial, sans-serif;
font-size: 20px;
text-rendering: optimizeLegibility;
-webkit-font-smoothing: antialiased;
-moz-osx-font-smoothing: grayscale;
}
.container {
margin: 0 auto;
max-width: 800px;
padding: 40px;
overflow: hidden;
position: relative;
}
a {
color: #f44336;
text-decoration: none;
}
a:hover {
text-decoration: underline;
}
header {
background-color: #f44336;
color: #fefefe;
}
.featured {
background-color: #efefef;
}
.featured__link {
display: inline-block;
margin-right: 45px;
}
h1 {
font-size: 2.75em;
font-weight: 400;
letter-spacing: -.03em;
line-height: 1em;
}
p {
line-height: 1.5em;
}
small {
font-weight: 400;
}
code {
font-family: Menlo, monospace;
font-size: 15px;
vertical-align: middle;
}
pre {
overflow: auto;
width: 100%;
}
pre code {
font-size: 14px;
}
.actions {
margin-top: 30px;
}
.btn {
background-color: #f44336;
border-width: 0;
border-radius: 4px;
color: #fefefe;
cursor: pointer;
font-weight: 700;
padding: 6px 12px;
text-transform: uppercase;
transition: all .35s ease;
}
.btn:active {
background-color: #d32f2f;
}
.scrollable-parent,
.scrollable-element-to-top,
.scrollable-element-by {
background-color: #efefef;
border-radius: 4px;
margin: 20px 0 0;
max-height: 200px;
overflow: scroll;
padding: 30px 50px;
}
.hello {
text-align: center;
}
footer {
background-color: #404040;
color: #fefefe;
font-size: 18px;
}
footer a {
color: inherit;
}
</style>
</head>
<body>
<header>
<div class="container">
<h1>smooth scroll behavior polyfill</h1>
</div>
</header>
<main class="featured">
<div class="container">
<p>The <strong>Scroll Behavior</strong> specification has been introduced as an extension of the <strong>Window</strong> interface to allow for the developer to opt in to native smooth scrolling.</p>
<p>Check the repository on <a href="https://github.com/iamdustan/smoothscroll">GitHub</a> or download the polyfill as an <a href="https://npmjs.org/smoothscroll-polyfill">npm module</a>.</p>
</div>
</main>
<section class="sample sample-scrollToBottom">
<div class="container">
<h2>window.scroll <small>or</small> window.scrollTo</h2>
<pre><code>window.scroll({ top: 2500, left: 0, behavior: 'smooth' });</code></pre>
<div class="actions">
<button class="btn js-scroll-to-bottom">scroll to bottom</button>
</div>
</div>
</section>
<section class="sample sample-scrollBy">
<div class="container">
<h2>window.scrollBy</h2>
<pre><code>window.scrollBy({ top: 100, left: 0, behavior: 'smooth' });</code></pre>
<div class="actions">
<button class="btn js-scroll-by">scroll by 100 pixels</button>
</div>
</div>
</section>
<section class="sample sample-scrollBack">
<div class="container">
<h2>window.scrollBy</h2>
<pre><code>window.scrollBy({ top: -100, left: 0, behavior: 'smooth' });</code></pre>
<div class="actions">
<button class="btn js-scroll-back">scroll back 100 pixels</button>
</div>
</div>
</section>
<section class=" sample sample--scrollIntoView">
<div class="container">
<h2>element.scrollIntoView</h2>
<pre><code>document.querySelector('.hello').scrollIntoView({ behavior: 'smooth' });</code></pre>
<div class="actions">
<button class="btn js-scroll-into-hello">Scroll into view</button>
</div>
<article class="scrollable-parent">
<p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Qui iure obcaecati, repudiandae aspernatur cumque recusandae
adipisci consequuntur maiores, quo in nulla ratione facere distinctio beatae, quae consequatur ab labore dolorum.</p>
<p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Qui iure obcaecati, repudiandae aspernatur cumque recusandae
adipisci consequuntur maiores, quo in nulla ratione facere distinctio beatae, quae consequatur ab labore dolorum.</p>
<p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Qui iure obcaecati, repudiandae aspernatur cumque recusandae
adipisci consequuntur maiores, quo in nulla ratione facere distinctio beatae, quae consequatur ab labore dolorum.</p>
<h3 class="hello"><em>hello!</em></h3>
<p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Qui iure obcaecati, repudiandae aspernatur cumque recusandae
adipisci consequuntur maiores, quo in nulla ratione facere distinctio beatae, quae consequatur ab labore dolorum.</p>
<p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Qui iure obcaecati, repudiandae aspernatur cumque recusandae
adipisci consequuntur maiores, quo in nulla ratione facere distinctio beatae, quae consequatur ab labore dolorum.</p>
<p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Qui iure obcaecati, repudiandae aspernatur cumque recusandae
adipisci consequuntur maiores, quo in nulla ratione facere distinctio beatae, quae consequatur ab labore dolorum.</p>
</article>
</div>
</section>
<section class="sample sample-elementScrollToTop">
<div class="container">
<h2>element.scroll <small>or</small> element.scrollTo</h2>
<pre><code>element.scroll({ top: 0, left: 0, behavior: 'smooth' });</code></pre>
<div class="actions">
<button class="btn js-element-scroll-to-top">scroll element to top</button>
</div>
<article class="scrollable-element-to-top">
<p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Qui iure obcaecati, repudiandae aspernatur cumque recusandae
adipisci consequuntur maiores, quo in nulla ratione facere distinctio beatae, quae consequatur ab labore dolorum.</p>
<p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Qui iure obcaecati, repudiandae aspernatur cumque recusandae
adipisci consequuntur maiores, quo in nulla ratione facere distinctio beatae, quae consequatur ab labore dolorum.</p>
<p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Qui iure obcaecati, repudiandae aspernatur cumque recusandae
adipisci consequuntur maiores, quo in nulla ratione facere distinctio beatae, quae consequatur ab labore dolorum.</p>
<h3 class="hello"><em>bye!</em></h3>
</article>
</div>
</section>
<section class="sample sample-scrollBy2">
<div class="container">
<h2>element.scrollBy</h2>
<pre><code>element.scrollBy({ top: 100, left: 0, behavior: 'smooth' });</code></pre>
<div class="actions">
<button class="btn js-element-scroll-by">scroll element by 100 pixels</button>
</div>
<article class="scrollable-element-by">
<h3 class="hello"><em>bye!</em></h3>
<p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Qui iure obcaecati, repudiandae aspernatur cumque recusandae
adipisci consequuntur maiores, quo in nulla ratione facere distinctio beatae, quae consequatur ab labore dolorum.</p>
<p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Qui iure obcaecati, repudiandae aspernatur cumque recusandae
adipisci consequuntur maiores, quo in nulla ratione facere distinctio beatae, quae consequatur ab labore dolorum.</p>
<p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Qui iure obcaecati, repudiandae aspernatur cumque recusandae
adipisci consequuntur maiores, quo in nulla ratione facere distinctio beatae, quae consequatur ab labore dolorum.</p>
<p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Qui iure obcaecati, repudiandae aspernatur cumque recusandae
adipisci consequuntur maiores, quo in nulla ratione facere distinctio beatae, quae consequatur ab labore dolorum.</p>
<p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Qui iure obcaecati, repudiandae aspernatur cumque recusandae
adipisci consequuntur maiores, quo in nulla ratione facere distinctio beatae, quae consequatur ab labore dolorum.</p>
<p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Qui iure obcaecati, repudiandae aspernatur cumque recusandae
adipisci consequuntur maiores, quo in nulla ratione facere distinctio beatae, quae consequatur ab labore dolorum.</p>
</article>
</div>
</section>
<section class="sample sample-scrollToTop">
<div class="container">
<h2>Scroll to top</h2>
<pre><code>window.scroll({ top: 0, left: 0, behavior: 'smooth' });</code></pre>
<p><strong>or</strong></p>
<pre><code>document.querySelector('header').scrollIntoView({ behavior: 'smooth' });</code></pre>
<div class="actions">
<button class="btn js-scroll-to-top">scroll to top</button>
</div>
</div>
</section>
<section>
<div class="container"></div>
</section>
<section class="featured">
<div class="container">
<a class="featured__link" href="https://github.com/iamdustan/smoothscroll">Polyfill on <strong>GitHub</strong></a>
<a class="featured__link" href="https://npmjs.org/package/smoothscroll-polyfill">Polyfill on <strong>npm</strong></a>
<a class="featured__link" href="https://drafts.csswg.org/cssom-view/#extensions-to-the-window-interface">Draft on <strong>W3C</strong></a>
<a class="featured__link" href="https://developer.mozilla.org/en-US/docs/Web/CSS/scroll-behavior">Documentation on <strong>MDN</strong></a>
</div>
</section>
<footer>
<div class="container">
<p>Polyfill written by <a href="https://twitter.com/iamdustan">Dustan Kasten</a> and <a href="https://twitter.com/jeremenichelli">Jeremias Menichelli</a></p>
<p>All rights reserved © <a href="https://iamdustan.github.io/smoothscroll">https://iamdustan.github.io/smoothscroll</a></p>
</div>
</footer>
<script>
// add event listener on load
window.addEventListener('load', function() {
// scroll to bottom
document.querySelector('.js-scroll-to-bottom').addEventListener('click', function(e) {
e.preventDefault();
window.scrollTo({ top: document.body.clientHeight - window.innerHeight, left: 0, behavior: 'smooth' });
});
// scroll to top
document.querySelector('.js-scroll-to-top').addEventListener('click', function(e) {
e.preventDefault();
document.querySelector('header').scrollIntoView({ behavior: 'smooth' });
});
// scroll by
document.querySelector('.js-scroll-by').addEventListener('click', function(e) {
e.preventDefault();
window.scrollBy({ top: 100, left: 0, behavior: 'smooth' });
});
// scroll back
document.querySelector('.js-scroll-back').addEventListener('click', function(e) {
e.preventDefault();
window.scrollBy({ top: -100, left: 0, behavior: 'smooth' });
});
// scroll into view
document.querySelector('.js-scroll-into-hello').addEventListener('click', function(e) {
e.preventDefault();
document.querySelector('.hello').scrollIntoView({ behavior: 'smooth' });
});
// element scroll to
document.querySelector('.scrollable-element-to-top').scrollTop = 10000;
document.querySelector('.js-element-scroll-to-top').addEventListener('click', function(e) {
e.preventDefault();
document.querySelector('.scrollable-element-to-top').scroll({ top: 0, left: 0, behavior: 'smooth' });
});
// element scroll by
document.querySelector('.js-element-scroll-by').addEventListener('click', function(e) {
e.preventDefault();
document.querySelector('.scrollable-element-by').scrollBy({ top: 100, left: 0, behavior: 'smooth' });
});
});
</script>
</body>
</html>