3D Parallax Scroll Effect In JavaScript – Paralax.js

A JavaScript & CSS solution that applies an interactive 3D parallax scroll effect to different layers within the document on page scroll.

How to use it:

1. Add layers to the parallax container.

<div class="paralax">
  <div class="paralax__item p-item1"></div>
  <div class="paralax__item p-item2"></div>
  <div class="paralax__item p-item3"></div>
  <div class="paralax__item p-item4"></div>
</div>

2. Add depth & background images to the layers.

.paralax {
  position: absolute;
  height: 100%;
}
.paralax__item {
  position: fixed;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
}
.p-item1 {
  background: url("1.png") center/cover no-repeat;
}
.p-item2 {
  background: url("2.png") bottom right/45% no-repeat;
  z-index: 2;
}
.p-item3 {
  background: url("3.png") bottom/100% no-repeat;
  z-index: 2;
}
.p-item4 {
  background: url("4.png") bottom/100% no-repeat;
  z-index: 2;
}
.p-item4::before {
  position: absolute;
  top: 0;
  left: 0;
  width: 10000%;
  height: 100%;
  content: '';
  background: url("2.png") repeat-x;
  background-size: contain;
  background-position: center;
  -webkit-animation: marquee 20s linear infinite;
          animation: marquee 20s linear infinite;
  z-index: 1;
}
@-webkit-keyframes marquee {
  0% {
    -webkit-transform: translate3d(0, 0, 0);
            transform: translate3d(0, 0, 0);
  }
  100% {
    -webkit-transform: translate3d(-200vw, 0, 0);
            transform: translate3d(-200vw, 0, 0);
  }
}
@keyframes marquee {
  0% {
    -webkit-transform: translate3d(0, 0, 0);
            transform: translate3d(0, 0, 0);
  }
  100% {
    -webkit-transform: translate3d(-200vw, 0, 0);
            transform: translate3d(-200vw, 0, 0);
  }
}

3. Load the main JavaScript parallax.js at the end of the document. That’ it.

<script src="paralax.js"></script>