<html>

<head>
  <title>Sun Header With Rising Logo Bouncing Letters Using Trig.js</title>
  <script src="https://cdn.jsdelivr.net/npm/trig-js/src/trig.min.js"></script>
</head>

<body>

  <header data-trig data-trig-var="true" data-trig-degrees="true" data-trig-max="200">
    <h1>
      <span id="l1" class="letter">T</span>
      <span id="l2" class="letter">r</span>
      <span id="l3" class="letter">i</span>
      <span id="l4" class="letter">g</span>
      <span id="l5" class="letter">.</span>
      <span id="l6" class="letter">j</span>
      <span id="l7" class="letter">s</span>
    </h1>
  </header>

  <div class="main" id="main" data-trig data-trig-var="true" data-trig-global="true">

  </div>
  <div class="container">
    <div class="alignCenter">
      <div>Sun Header With Rising Logo Bouncing Letters Using <a href="https://github.com/iDev-Games/Trig-JS" target="_Blank">Trig.js</a></div>
    </div>
  </div>

</body>

</html>
@import url("https://fonts.googleapis.com/css2?family=Mona+Sans:ital,wght@0,200..900;1,200..900&family=Pacifico&display=swap");

body,
html {
  font-family: Mona Sans;
  background-color: #0d1117;
  color: #f1f1f1;
  padding: 0px;
  margin: 0px;
}

a {
  color: #fff;
}

.main {
  max-width: 800px;
  margin: auto;
  position: relative;
  top: 0px;
  display: block;
}

.container {
  width: 80vw;
  min-height: 100vh;
  position: relative;
  margin: auto;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
}

header {
  width: 100%;
  height: 100vh;
  background: linear-gradient(
    0deg,
    rgba(2, 0, 36, 1) 0%,
    rgba(0, 181, 255, 1) 0%,
    rgba(9, 75, 121, 1) 100%
  );
  font-family: "Pacifico", cursive;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: end;
  overflow: hidden;
  position: relative;
  text-shadow: 4px 3px 20px rgba(0, 0, 0, 0.4);
}

header:before {
  content: "";
  width: 300px;
  height: 300px;
  background-color: #ffdd00;
  border-radius: 50%;
  position: absolute;
  top: 0;
  box-shadow: 0px 0px 300px 45px rgba(255, 221, 0, 0.9);
  transform: scale(calc(var(--trig) + -30%))
    rotate(calc(var(--trig-deg-reverse) + 20deg));
  transform-origin: 400px 600px;
  transition: transform ease-out 0.3s;
}

h1 {
  letter-spacing: -10px;
  font-size: 120px;
  display: inline-block;
  z-index: 2;
  transform: translateY(var(--trig-reverse));
  transition: transform ease-out 0.3s;
}

.letter {
  display: inline-block;
  transition: transform ease-out 0.3s;
}

h1 #l1.selected,
h1 #l2.selected,
h1 #l3.selected,
h1 #l4.selected,
h1 #l5.selected,
h1 #l6.selected,
h1 #l7.selected {
  transform: translateY(-30px);
}

@media screen and (max-width: 768px) {
  h1 {
    font-size: 48px;
    letter-spacing: 0px;
  }
}

function checkTrig() {
  const element = document.querySelector("header");
  const trigValue = parseFloat(
    getComputedStyle(element).getPropertyValue("--trig")
  );

  const letters = document.querySelectorAll(".letter");
  const index = Math.min(
    Math.max(Math.floor((trigValue - 50) / 10), 0),
    letters.length
  );

  letters.forEach((letter, i) => {
    if (i === index) {
      letter.classList.add("selected");
    } else {
      letter.classList.remove("selected");
    }
  });

  requestAnimationFrame(checkTrig);
}

checkTrig();

External CSS

This Pen doesn't use any external CSS resources.

External JavaScript

This Pen doesn't use any external JavaScript resources.