jQuery Fullscreen Vertical Slider with Parallax Effect

A cool, responsive, vertical, full page slider with a subtle background parallax scrolling effect, built using jQuery, lodash.js and several CSS3 properties.

See also:

• Smooth Full-page Slider Plugin with Parallax Effects - Vertical Slider
• Simple jQuery Image Carousel with Parallax Effect
• Easy and Fast Parallax Image Slider with CSS3 and jQuery - MrJaredParallaxSlide

How to use it:

1. Add content slides to the page slider.

<div class="container">
  <section class="background">
    <div class="content-wrapper">
      <p class="content-title">Section One</p>
      <p class="content-subtitle">Subtitle One</p>
    </div>
  </section>
  <section class="background">
    <div class="content-wrapper">
      <p class="content-title">Section Two</p>
      <p class="content-subtitle">Subtitle Two</p>
    </div>
  </section>
  <section class="background">
    <div class="content-wrapper">
      <p class="content-title">Section One</p>
      <p class="content-subtitle">Subtitle Three</p>
    </div>
  </section>
</div>

2. The primary CSS / CSS3 rules.

html, body { overflow: hidden; }

.background {
  background-size: cover;
  background-repeat: no-repeat;
  background-position: center center;
  overflow: hidden;
  will-change: transform;
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
  height: 130vh;
  position: fixed;
  width: 100%;
  -webkit-transform: translateY(20vh);
  -ms-transform: translateY(20vh);
  transform: translateY(20vh);
  -webkit-transition: all 1.4s cubic-bezier(0.22, 0.44, 0, 1);
  transition: all 1.4s cubic-bezier(0.22, 0.44, 0, 1);
}

3. Add background images to the slides

.background:first-child {
  background-image: url(1.jpg);
  -webkit-transform: translateY(-10vh);
  -ms-transform: translateY(-10vh);
  transform: translateY(-10vh);
}

.background:first-child .content-wrapper {
  -webkit-transform: translateY(10vh);
  -ms-transform: translateY(10vh);
  transform: translateY(10vh);
}

.background:nth-child(2) { background-image: url(2.jpg); }

.background:nth-child(3) { background-image: url(3.jpg); }

4. Set stacking context of slides.

.background:nth-child(1) { z-index: 2; }

.background:nth-child(2) { z-index: 1; }

.content-wrapper {
  height: 100vh;
  display: -webkit-box;
  display: -webkit-flex;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: center;
  -webkit-justify-content: center;
  -ms-flex-pack: center;
  justify-content: center;
  text-align: center;
  -webkit-flex-flow: column nowrap;
  -ms-flex-flow: column nowrap;
  flex-flow: column nowrap;
  color: #fff;
  font-family: Montserrat;
  text-transform: uppercase;
  -webkit-transform: translateY(40vh);
  -ms-transform: translateY(40vh);
  transform: translateY(40vh);
  will-change: transform;
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
  -webkit-transition: all 1.9s cubic-bezier(0.22, 0.44, 0, 1);
  transition: all 1.9s cubic-bezier(0.22, 0.44, 0, 1);
}

.content-title {
  font-size: 12vh;
  line-height: 1.4;
}

5. Include the needed lodash.js and jQuery JavaScript library at the bottom of the web page.

<script src="/path/to/lodash.min.js"></script> 
<script src="/path/to/jquery.min.js"></script> 

6. The core JavaScript to active the full page slider.

// ------------- VARIABLES ------------- //
var ticking = false;
var isFirefox = (/Firefox/i.test(navigator.userAgent));
var isIe = (/MSIE/i.test(navigator.userAgent)) || (/Trident.*rv\:11\./i.test(navigator.userAgent));
var scrollSensitivitySetting = 30; //Increase/decrease this number to change sensitivity to trackpad gestures (up = less sensitive; down = more sensitive) 
var slideDurationSetting = 800; //Amount of time for which slide is "locked"
var currentSlideNumber = 0;
var totalSlideNumber = $(".background").length;

// ------------- DETERMINE DELTA/SCROLL DIRECTION ------------- //
function parallaxScroll(evt) {
  if (isFirefox) {
    //Set delta for Firefox
    delta = evt.detail * (-120);
  } else if (isIe) {
    //Set delta for IE
    delta = -evt.deltaY;
  } else {
    //Set delta for all other browsers
    delta = evt.wheelDelta;
  }

  if (ticking != true) {
    if (delta <= -scrollSensitivitySetting) {
      //Down scroll
      ticking = true;
      if (currentSlideNumber !== totalSlideNumber - 1) {
        currentSlideNumber++;
        nextItem();
      }
      slideDurationTimeout(slideDurationSetting);
    }
    if (delta >= scrollSensitivitySetting) {
      //Up scroll
      ticking = true;
      if (currentSlideNumber !== 0) {
        currentSlideNumber--;
      }
      previousItem();
      slideDurationTimeout(slideDurationSetting);
    }
  }
}

// ------------- SET TIMEOUT TO TEMPORARILY "LOCK" SLIDES ------------- //
function slideDurationTimeout(slideDuration) {
  setTimeout(function() {
    ticking = false;
  }, slideDuration);
}

// ------------- ADD EVENT LISTENER ------------- //
var mousewheelEvent = isFirefox ? "DOMMouseScroll" : "wheel";
window.addEventListener(mousewheelEvent, _.throttle(parallaxScroll, 60), false);

// ------------- SLIDE MOTION ------------- //
function nextItem() {
  var $previousSlide = $(".background").eq(currentSlideNumber - 1);
  $previousSlide.css("transform", "translate3d(0,-130vh,0)").find(".content-wrapper").css("transform", "translateY(40vh)");
  currentSlideTransition();
}

function previousItem() {
  var $previousSlide = $(".background").eq(currentSlideNumber + 1);
  $previousSlide.css("transform", "translate3d(0,30vh,0)").find(".content-wrapper").css("transform", "translateY(30vh)");
  currentSlideTransition();
}

function currentSlideTransition() {
  var $currentSlide = $(".background").eq(currentSlideNumber);
  $currentSlide.css("transform", "translate3d(0,-15vh,0)").find(".content-wrapper").css("transform", "translateY(15vh)");;
}

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This awesome jQuery plugin is developed by eehayman. For more Advanced Usages, please check the demo page or visit the official website.