<section>
  <h1>Scroll Down to Reveal Elements &#8595;</h1>
</section>
<section>
  <div class="container reveal fade-bottom">
    <h2>Caption</h2>
    <div class="text-container">
      <div class="text-box">
        <h3>Section Text</h3>
        <p>
          Lorem ipsum dolor sit amet consectetur adipisicing elit. Tempore
          eius molestiae perferendis eos provident vitae iste.
        </p>
      </div>
      <div class="text-box">
        <h3>Section Text</h3>
        <p>
          Lorem ipsum dolor sit amet consectetur adipisicing elit. Tempore
          eius molestiae perferendis eos provident vitae iste.
        </p>
      </div>
      <div class="text-box">
        <h3>Section Text</h3>
        <p>
          Lorem ipsum dolor sit amet consectetur adipisicing elit. Tempore
          eius molestiae perferendis eos provident vitae iste.
        </p>
      </div>
    </div>
  </div>
</section>

<section>
  <div class="container reveal fade-left">
    <h2>Caption</h2>
    <div class="text-container">
      <div class="text-box">
        <h3>Section Text</h3>
        <p>
          Lorem ipsum dolor sit amet consectetur adipisicing elit. Tempore
          eius molestiae perferendis eos provident vitae iste.
        </p>
      </div>
      <div class="text-box">
        <h3>Section Text</h3>
        <p>
          Lorem ipsum dolor sit amet consectetur adipisicing elit. Tempore
          eius molestiae perferendis eos provident vitae iste.
        </p>
      </div>
      <div class="text-box">
        <h3>Section Text</h3>
        <p>
          Lorem ipsum dolor sit amet consectetur adipisicing elit. Tempore
          eius molestiae perferendis eos provident vitae iste.
        </p>
      </div>
    </div>
  </div>
</section>

<section>
  <div class="container reveal fade-right">
    <h2>Caption</h2>
    <div class="text-container">
      <div class="text-box">
        <h3>Section Text</h3>
        <p>
          Lorem ipsum dolor sit amet consectetur adipisicing elit. Tempore
          eius molestiae perferendis eos provident vitae iste.
        </p>
      </div>
      <div class="text-box">
        <h3>Section Text</h3>
        <p>
          Lorem ipsum dolor sit amet consectetur adipisicing elit. Tempore
          eius molestiae perferendis eos provident vitae iste.
        </p>
      </div>
      <div class="text-box">
        <h3>Section Text</h3>
        <p>
          Lorem ipsum dolor sit amet consectetur adipisicing elit. Tempore
          eius molestiae perferendis eos provident vitae iste.
        </p>
      </div>
    </div>
  </div>
</section>
@import url("https://fonts.googleapis.com/css2?family=Asap&display=swap");
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Asap", sans-serif;
}
body {
  background: #42455a;
}
section {
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
}
section:nth-child(1) {
  color: #e0ffff;
}
section:nth-child(2) {
  color: #42455a;
  background: #e0ffff;
}
section:nth-child(3) {
  color: #e0ffff;
}
section:nth-child(4) {
  color: #42455a;
  background: #e0ffff;
}
section .container {
  margin: 100px;
}
section h1 {
  font-size: 3rem;
  margin: 20px;
}
section h2 {
  font-size: 40px;
  text-align: center;
  text-transform: uppercase;
}
section .text-container {
  display: flex;
}
section .text-container .text-box {
  margin: 20px;
  padding: 20px;
  background: #00c2cb;
}
section .text-container .text-box h3 {
  font-size: 30px;
  text-align: center;
  text-transform: uppercase;
  margin-bottom: 10px;
}

@media (max-width: 900px) {
  section h1 {
    font-size: 2rem;
    text-align: center;
  }
  section .text-container {
    flex-direction: column;
  }
}

.reveal {
  position: relative;
  opacity: 0;
}

.reveal.active {
  opacity: 1;
}
.active.fade-bottom {
  animation: fade-bottom 1s ease-in;
}
.active.fade-left {
  animation: fade-left 1s ease-in;
}
.active.fade-right {
  animation: fade-right 1s ease-in;
}
@keyframes fade-bottom {
  0% {
    transform: translateY(50px);
    opacity: 0;
  }
  100% {
    transform: translateY(0);
    opacity: 1;
  }
}
@keyframes fade-left {
  0% {
    transform: translateX(-100px);
    opacity: 0;
  }
  100% {
    transform: translateX(0);
    opacity: 1;
  }
}

@keyframes fade-right {
  0% {
    transform: translateX(100px);
    opacity: 0;
  }
  100% {
    transform: translateX(0);
    opacity: 1;
  }
}

function reveal() {
  var reveals = document.querySelectorAll(".reveal");

  for (var i = 0; i < reveals.length; i++) {
    var windowHeight = window.innerHeight;
    var elementTop = reveals[i].getBoundingClientRect().top;
    var elementVisible = 150;

    if (elementTop < windowHeight - elementVisible) {
      reveals[i].classList.add("active");
    } else {
      reveals[i].classList.remove("active");
    }
  }
}

window.addEventListener("scroll", reveal, {passive: true});

External CSS

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External JavaScript

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