parallax-experiments-1

by Richard Hunter

HTML

<div class="container">
  <div class="foo"></div>
  <div class="foo"></div>
  <div class="foo"></div>
  <div class="foo"></div>
  <div class="foo"></div>
  <div class="foo"></div>
  <div class="foo"></div>
  <div class="foo"></div>
  <div class="foo"></div>
  <div class="foo"></div>
  <div class="foo"></div>
  <div class="foo"></div>
  <div class="foo"></div>
  <div class="foo"></div>
  <div class="sentinel"></div>
</div>

SCSS

.foo {
  width: 100px;
  height: 100px;
  opacity: 0.1;
  transform-origin: left top;
  position: absolute;
  left: 0;
  top: 0;
}

@mixin transform($z) {
  transform: scale(1 - $z) translateZ(1px * $z) translateX(100px) translateY(100px);
}

body {
  margin: 0;
}

.foo:nth-child(4n) {
  background: red;
}

.foo:nth-child(4n + 1) {
  background: lightblue;
}

.foo:nth-child(1) {
  @include transform(-0.01);
}

.foo:nth-child(2) {
  @include transform(-0.03);
}

.foo:nth-child(3) {
  @include transform(-0.05);
}

.foo:nth-child(4) {
  @include transform(-0.07);
}

.foo:nth-child(5) {
  @include transform(-0.09);
}

.foo:nth-child(6) {
  @include transform(-0.11);
}

.foo:nth-child(7) {
  @include transform(-0.13);
}

.foo:nth-child(8) {
  @include transform(-0.15);
}

.foo:nth-child(9) {
  @include transform(-0.17);
}

.foo:nth-child(10) {
  @include transform(-0.19);
}

.foo:nth-child(11) {
  @include transform(-0.21);
}

.foo:nth-child(12) {
  @include transform(-0.23);
}

.foo:nth-child(13) {
  @include transform(-0.25);
}

.foo:nth-child(14) {
  @include transform(-0.27);
}

.container {
  background: lightgoldenrodyellow;
  perspective: 1px;
  perspective-origin: left top;
  margin: 10px;
  position: relative;
  height: 300px;
  overflow-y: scroll;
}

.sentinel {
  width: 10px;
  height: 10px;
  position: absolute;
  left: 0;
  top: 0;
  transform: translateY(1000px);
}