Простой Parallax эффект прокрутки

Пример прокрутки для сайта с parallax эффектом.

При прокрутке динамически происходит смена фона с параллакс-эффектом. Этот пример Parallax скроллинга реализован с помощью CSS и JS.

HTML

<div class="container">
 <section>
 <div class="image" data-type="background" data-speed="2"></div>
 <div class="stuff" data-type="content"><h1>Простой Parallax эффект прокрутки</h1></div>
 </section>

 <section>
 <div class="image" data-type="background" data-speed="7"></div>
 <div class="stuff" data-type="content">Deserunt maiores minima ipsa. Adipisci, corrupti, voluptatibus! Similique quidem necessitatibus provident, iusto ducimus architecto doloremque quo molestiae voluptatibus voluptatum alias, iste omnis, consectetur, explicabo magni quae. Possimus obcaecati, ea repellendus.</div>
 </section>

 <section>
 <div class="image" data-type="background" data-speed="6"></div>
 <div class="stuff" data-type="content">Accusamus at ex amet perferendis atque fuga, ad earum, ipsa perspiciatis, dolore neque, accusantium consectetur quis voluptatibus culpa architecto animi natus facere expedita sed. Voluptatem odit explicabo amet neque aut.</div>
 </section>
 
 <section>
 <div class="image" data-type="background" data-speed="5"></div>
 <div class="stuff" data-type="content">Accusamus at ex amet perferendis atque fuga, ad earum, ipsa perspiciatis, dolore neque, accusantium consectetur quis voluptatibus culpa architecto animi natus facere expedita sed. Voluptatem odit explicabo amet neque aut.</div>
 </section>
 
 <section>
 <div class="image" data-type="background" data-speed="3"></div>
 <div class="stuff" data-type="content">Accusamus at ex amet perferendis atque fuga, ad earum, ipsa perspiciatis, dolore neque, accusantium consectetur quis voluptatibus culpa architecto animi natus facere expedita sed. Voluptatem odit explicabo amet neque aut.</div>
 </section>
 
 <section>
 <div class="image" data-type="background" data-speed="3"></div>
 <div class="stuff" data-type="content">Accusamus at ex amet perferendis atque fuga, ad earum, ipsa perspiciatis, dolore neque, accusantium consectetur quis voluptatibus culpa architecto animi natus facere expedita sed. Voluptatem odit explicabo amet neque aut.</div>
 </section>
</div>

CSS

@import url(http://fonts.googleapis.com/css?family=Open+Sans:400,300,700,600);
html, body {
 background-color: #2c3e50;
 font-family: 'Open Sans', sans-serif;
 -webkit-font-smoothing: antialiased;
}

.container {
 display: -webkit-box;
 display: -webkit-flex;
 display: -ms-flexbox;
 display: flex;
 -webkit-align-content: center;
 -ms-flex-line-pack: center;
 align-content: center;
 -webkit-box-align: center;
 -webkit-align-items: center;
 -ms-flex-align: center;
 align-items: center;
 -webkit-box-orient: vertical;
 -webkit-box-direction: normal;
 -webkit-flex-direction: column;
 -ms-flex-direction: column;
 flex-direction: column;
 -webkit-flex-wrap: nowrap;
 -ms-flex-wrap: nowrap;
 flex-wrap: nowrap;
 height: 100%;
 -webkit-justify-content: space-around;
 -ms-flex-pack: distribute;
 justify-content: space-around;
 position: relative;
 width: 100%;
}
.container section {
 width: 100%;
 height: 100vh;
 -webkit-box-flex: 1;
 -webkit-flex: 1;
 -ms-flex: 1;
 flex: 1;
 display: -webkit-box;
 display: -webkit-flex;
 display: -ms-flexbox;
 display: flex;
 text-align: center;
 position: relative;
 overflow: hidden;
 background-color: #000;
}
.container section:nth-child(1) .image {
 background-image: url(http://38.media.tumblr.com/2c1a9d53169f1eca25b2a0b8238744c9/tumblr_n9hxdqatsK1st5lhmo1_1280.jpg);
}
.container section:nth-child(2) .image {
 background-image: url(http://38.media.tumblr.com/e77ef190ff20487acedb1d664a535c1b/tumblr_n8zlzxbFUT1st5lhmo1_1280.jpg);
}
.container section:nth-child(3) .image {
 background-image: url(http://38.media.tumblr.com/e6c1c887ba8e24a855351940bcd3c343/tumblr_n8zm44LBpl1st5lhmo1_1280.jpg);
}
.container section:nth-child(4) .image {
 background-image: url(http://38.media.tumblr.com/4e9d8c075b15f5922682bfaa13a8125c/tumblr_n7yhezarqF1st5lhmo1_1280.jpg);
}
.container section:nth-child(5) .image {
 background-image: url(http://farm2.staticflickr.com/1163/792191425_ac00528d38_o_d.jpg);
}
.container section:nth-child(6) .image {
 background-image: url(http://31.media.tumblr.com/cd40dba26eabfc0901892be37f207cf6/tumblr_n7fgl3sQS61st5lhmo1_1280.jpg);
}
.container section .image {
 background-attachment: fixed;
 -webkit-background-size: cover;
 background-size: cover;
 width: 100%;
 height: 100%;
 position: absolute;
 z-index: 500;
 opacity: 0.4;
}
.container section .stuff {
 display: -webkit-box;
 display: -webkit-flex;
 display: -ms-flexbox;
 display: flex;
 -webkit-box-orient: vertical;
 -webkit-box-direction: normal;
 -webkit-flex-direction: column;
 -ms-flex-direction: column;
 flex-direction: column;
 -webkit-flex-wrap: nowrap;
 -ms-flex-wrap: nowrap;
 flex-wrap: nowrap;
 height: 100%;
 width: 100%;
 max-width: 70%;
 -webkit-box-pack: center;
 -webkit-justify-content: center;
 -ms-flex-pack: center;
 justify-content: center;
 text-align: center;
 z-index: 1000;
 color: #e67e22;
 margin: 0 auto;
 font-size: 26px;
 position: relative;
}
.container section .stuff:before, .container section .stuff:after {
 width: 100%;
 height: 1px;
 display: block;
 background-color: #d35400;
 content: "";
 margin: 30px 0;
}

.at-twitter {
 position: fixed;
 right: 20px;
 bottom: 20px;
 color: #f1c40f;
 z-index: 5000;
}
.at-twitter:visited {
 color: #f1c40f;
}

a {
 color: inherit;
 text-decoration: none;
}
a:hover, a:focus {
 color: inherit;
 text-decoration: underline;
}

JS

function parallaxIt() {
 var $fwindow = $(window);

 $('[data-type="content"]').each(function (index, e) {
 var scrollTop = $fwindow.scrollTop();
 var $contentObj = $(this);

 $fwindow.on('scroll resize', function (){
 scrollTop = $fwindow.scrollTop();

 $contentObj.css('top', ($contentObj.height() * index) - scrollTop);
 });
 });

 $('[data-type="background"]').each(function(){
 var $backgroundObj = $(this);

 $fwindow.on('scroll resize', function() {
 var yPos = - ($fwindow.scrollTop() / $backgroundObj.data('speed')); 
 console.log(yPos)
 var coords = '50% '+ yPos + 'px';

 // Move the background
 $backgroundObj.css({ backgroundPosition: coords });
 }); 
 }); 
 
 $fwindow.trigger('scroll');
};

parallaxIt();