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HTML

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About the <head>

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Insecure Resource

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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

About 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-wrapper">
  <div class="main-wrapper__title-wrapper">
    <div class="main-wrapper__title-content">
      <div>
        <h1 class="head first">Lorem ipsum</h1>
      </div>
      <div>
        <h1 class="head second">Dolor sit amet</h1>
      </div>
    </div>
  </div>
  
  <!-- <div class="main-wrapper__title-wrapper">
    <div class="main-wrapper__title-content">
      <div>
        <h1>Dolor sit amet</h1>
      </div>
    </div>
  </div> -->
  
  <div class="main-wrapper__panel-wrapper">
    <div class="main-wrapper__panel-wrapper-overlay"></div>
    
    <div class="main-wrapper__panel" style="background-image: url('https://dummyimage.com/1920x1080/f1f1f1/454545.png&text=A')"></div>
    
    <div class="main-wrapper__panel" style="background-image: url('https://dummyimage.com/1920x1080/27aa67/ffffff.png&text=B')"></div>
    
    <div class="main-wrapper__panel" style="background-image: url('https://dummyimage.com/1920x1080/f08e29/ffffff.png&text=C')"></div>
    
    <div class="main-wrapper__panel" style="background-image: url('https://dummyimage.com/1920x1080/32c4e4/ffffff.png&text=D')"></div>
    
    <div class="main-wrapper__panel" style="background-image: url('https://dummyimage.com/1920x1080/e031de/ffffff.png&text=E')"></div>
  </div>
</div>

<div class="other-content">
  <h1>Here's other content</h1>
  <h3>This might be some cool text</h3>
  <p>Austin fixie banh mi hell of yr sustainable taxidermy fashion axe man braid. Art party sustainable prism synth. Authentic ugh migas yuccie tofu tote bag. Bicycle rights vinyl mlkshk ugh single-origin coffee williamsburg vaporware paleo put a bird on it. Ramps fixie paleo jianbing brunch coloring book intelligentsia blue bottle fashion axe cronut hammock food truck seitan man bun. Humblebrag mumblecore try-hard, irony man bun iPhone mlkshk craft beer. Retro cloud bread 8-bit authentic selvage bitters af ethical tumeric.

Lo-fi meggings sustainable 8-bit. Prism snackwave portland fanny pack. Blue bottle hashtag hammock man bun, tbh paleo XOXO activated charcoal celiac viral narwhal shaman portland crucifix. Meggings narwhal shaman YOLO disrupt, iceland gentrify mlkshk fam banh mi keytar bitters kale chips paleo pickled.

Chillwave selfies bushwick, tacos chartreuse iceland synth +1 swag roof party occupy. Freegan meditation normcore, bushwick kinfolk church-key microdosing cliche lo-fi vexillologist cold-pressed hell of. Green juice humblebrag snackwave godard selvage. Literally pinterest vegan cold-pressed roof party street art master cleanse chicharrones viral leggings jean shorts wayfarers pork belly ethical. Raclette austin meditation try-hard blog bushwick etsy yuccie ugh asymmetrical leggings.</p>
</h3>
!

CSS 

              
                body {
  background: #ffffff;
  margin: 0px,
}

.main-wrapper {
    position: relative;
    width: 100%;
    height: auto;
  
    &__title {
      &-wrapper {
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        z-index: 99;
      }

      &-content {
        position: sticky;
        top: 0;
        left: 0;
        height: 100vh;
        //background: green;

        & > div {
          width: 100%;
          position: absolute;
          top: 50%;
          left: 50%;
          transform: translate(-50%,-50%);
          text-align: center;

          h1 {
            font-size: 7vw;
            line-height: 6.5vw;
            color: #FFFFFF;
          }
        }
      }
    }
  
  &__panel {
      background-position: center center;
      background-repeat: no-repeat;
      background-size: cover;
      width: 100%;
      height: 100vh;

      &-wrapper {
        &-overlay {
          position: absolute;
          top: 0;
          left: 0;
          width: 100%;
          height: 100%;
          background: rgba(0, 0, 0, 0.2);
          z-index: 80;
        }
      }
    }
}

.other-content {
  padding: 100px 60px;
  
  p {
    font-size: 20px;
    line-height:30px;
  }
}

.head{
  visibility:hidden;
}
!

JS 

              
                console.clear();

gsap.registerPlugin(ScrollTrigger);

var panels_class = ".main-wrapper__panel";

gsap.set('.first', {autoAlpha:1});

var panels = gsap.utils.toArray(panels_class);

panels.forEach((panel, i) => {

  // Last element
  if ( i == ($(panels_class).length - 1) ) {
    console.log(panel);
    ScrollTrigger.create({
      trigger: panel,
      start: "top top",
      end: "bottom bottom",
      pin: true,
      pinSpacing: false,
      //markers: true,
    });

    return;
  }

  ScrollTrigger.create({
    trigger: panel,
    start: "top top",
    end: "bottom top",
    pin: true,
    pinSpacing: false,
    //markers: true
  });

});


var lineAnim = gsap.timeline({
  scrollTrigger: {
    trigger: panels[2], 
    start: "top top", 
    end: "+=50vh", // end after scrolling 50vh beyond the start
    // :entering, leaving, backwards, back past the beginning
    toggleActions: "play none none reset"
  },
})
.to('.first', {autoAlpha:0, duration:0.1})
.to('.second', {autoAlpha:1, duration:0.1})
!
999px

Console