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CSS

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CSS preprocessors help make authoring CSS easier. All of them offer things like variables and mixins to provide convenient abstractions.

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CSS Base

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JavaScript

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JavaScript preprocessors can help make authoring JavaScript easier and more convenient.

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Babel includes JSX processing.

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HTML 

              
                <div class="main_content">
  <div class="fake_content one">
    <h2>Fake content</h2>
  </div>
  <div class="real_content">
    <div class="media_content">
      <div class="big_media">
        <img src="http://via.placeholder.com/1000x633" alt="big media">
      </div>
      <div class="smalls_media">
        <div class="square">
          <img src="http://via.placeholder.com/400x400" alt="square">
        </div>
        <div class="square">
          <img src="http://via.placeholder.com/400x400" alt="square">
        </div>
      </div>
      <span class="title_media back">Motion</span>
      <span class="title_media front">Developement</span>
    </div>
  </div>
  <div class="fake_content two">
    <h2>Fake content</h2>
  </div>
</div>
!

CSS 

              
                @import url(https://fonts.googleapis.com/css?family=Open+Sans:300,400,700,800)

$primary: #E35205
$black: #000000
$white: #FFFFFF

img
  box-sizing: border-box
  border: 2px solid $primary

body
  margin: 0
  padding: 0

.main_content
  width: 100%
  margin: 0 auto
  font-family: 'Open sans', sans-serif
  
.fake_content
  display: flex
  justify-content: center
  align-items: center
  width: 100%
  background-color: rgba($primary, 0.8)
  
  &.one
    height: 800px
    
  &.two
    height: 1200px
    
  h2
    font-size: 80px
    line-height: 80px
    text-transform: uppercase
    font-weight: 800
    color: $white
    
.real_content
  width: 100%
  padding: 100px 100px 140px 100px //100 + 40px from transform
  box-sizing: border-box
  
.media_content
  position: relative
  display: flex
  align-items: flex-end
  
.title_media
  position: absolute
  display: block
  font-size: 150px
  line-height: 150px
  letter-spacing: -10px
  text-transform: uppercase
  font-weight: 800
  color: $black
  margin: 0
  left: 50%
  will-change: transform //IE like this
  
.front
  //top: 20px
  top: 260px

.back
  top: 120px
  //top: -100px
  //z-index: -1

.big_media
  //width: 60%
  img
    display: block
    max-width: 100%
    height: auto
  
.smalls_media
  width: 40%
  display: flex //Take care of flex in flex compatibility
  transform: translate(-100px, 40px)
  
  .square
    align-self: flex-end
    margin: 0 50px 0 0
    img
      display: block
      max-width: 100%
      height: auto
!

JS 

              
                $(document).ready(function($){
  
  //set DOM variables
  var $realContent = $('.real_content'),
      $titleFrontMedia = $('.title_media.front'),
      $titleBackMedia = $('.title_media.back');
  
  //set scrolling variables
  var scrollDelta = 2,
      scrollOffset = -1000;
  
  //set offset variables
  var offsetTopRealContent = $realContent.offset().top,
      realContentHeight = $realContent.outerHeight(),
      offsetBottomRealContent = offsetTopRealContent + realContentHeight;
  
  $(window).on('scroll', function(){
    var currentTop = $(window).scrollTop();
    
    if (currentTop >= (offsetTopRealContent + scrollOffset) && currentTop <= offsetBottomRealContent){
      // requestAnimationFrame
      titleAnimation(currentTop);
    }
    
  });
  
  function titleAnimation(currentTop){
    
    var transformNegativeTranslate = "translate(-" + currentTop/scrollDelta + "px, 0)",
        transformNegativeFasterTranslate = "translate(-" + currentTop/(scrollDelta+2) + "px, 0)";
        //transformPositiveTranslate = "translate(+" + currentTop/scrollDelta + "px, 0)";
     
    $titleFrontMedia.css({"-moz-transform" : transformNegativeFasterTranslate, "-webkit-transform" : transformNegativeFasterTranslate});
    $titleBackMedia.css({"-moz-transform" : transformNegativeTranslate, "-webkit-transform" : transformNegativeTranslate});
   
  }
  
});
!
999px

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