AnimeJS Staggered Grid Effect

index.html

<div id="tiles"></div>

<h1 id="title" class="centered">
  The name of the game is
  <span class="fancy">Chess</span>.
</h1>

<i id="icon" class="fa-solid fa-chess centered"></i>

<a id="source-link" class="meta-link" href="https://cdpn.io/YzXOGpm" target="_blank">
  <i class="fa-solid fa-link"></i>
  <span>Source</span>
</a>

<a id="yt-link" class="meta-link" href="https://youtu.be/bAwEj_mSzOs" target="_blank">
  <i class="fa-brands fa-youtube"></i>
  <span>5 min tutorial</span>
</a>

script.js

const wrapper = document.getElementById("tiles");

let columns = 0,
    rows = 0,
    toggled = false;

const toggle = () => {
  toggled = !toggled;
  
  document.body.classList.toggle("toggled");
}

const handleOnClick = index => {
  toggle();
  
  anime({
    targets: ".tile",
    opacity: toggled ? 0 : 1,
    delay: anime.stagger(50, {
      grid: [columns, rows],
      from: index
    })
  });
}

const createTile = index => {
  const tile = document.createElement("div");
  
  tile.classList.add("tile");
  
  tile.style.opacity = toggled ? 0 : 1;
  
  tile.onclick = e => handleOnClick(index);
  
  return tile;
}

const createTiles = quantity => {
  Array.from(Array(quantity)).map((tile, index) => {
    wrapper.appendChild(createTile(index));
  });
}

const createGrid = () => {
  wrapper.innerHTML = "";
  
  const size = document.body.clientWidth > 800 ? 100 : 50;
  
  columns = Math.floor(document.body.clientWidth / size);
  rows = Math.floor(document.body.clientHeight / size);
  
  wrapper.style.setProperty("--columns", columns);
  wrapper.style.setProperty("--rows", rows);
  
  createTiles(columns * rows);
}

createGrid();

window.onresize = () => createGrid();

scripts

<script src="https://kit.fontawesome.com/944eb371a4.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/animejs/3.2.1/anime.min.js"></script>

style.css

:root {
  --g1: rgb(98, 0, 234);
  --g2: rgb(236, 64, 122);
}

@keyframes background-pan {
  from {
    background-position: 0% center;
  }
  
  to {
    background-position: -200% center;
  }
}

body {
  animation: background-pan 10s linear infinite;
  background: linear-gradient(
    to right,
    var(--g1),
    var(--g2),
    var(--g1)
  );
  background-size: 200%;
  height: 100vh;
  overflow: hidden;
  margin: 0px;
}

body.toggled {
  animation: none;
}

body.toggled > #title {
  opacity: 0;
}

body.toggled > #icon {
  opacity: 1;
}

body.toggled > #tiles > .tile:hover {
  opacity: 0.1 !important;
}

.centered {
  left: 50%;
  position: absolute;
  top: 50%;
  transform: translate(-50%, -50%);
}

#tiles {
  height: calc(100vh - 1px);
  width: calc(100vw - 1px);
  position: relative;
  z-index: 2;
  
  display: grid;
  grid-template-columns: repeat(var(--columns), 1fr);
  grid-template-rows: repeat(var(--rows), 1fr);
}

.tile {
  cursor: pointer;
  position: relative;
}

.tile:hover:before {
  background-color: rgb(30, 30, 30);
}

.tile:before {
  background-color: rgb(15, 15, 15);
  content: "";
  inset: 0.5px;
  position: absolute;
}

#title {
  color: white;
  font-family: "Rubik", sans-serif;
  font-size: 6vw;
  margin: 0px;
  pointer-events: none;
  transition: opacity 1200ms ease;
  width: 50vw;
  z-index: 3;
}

#title > .fancy {
  color: var(--g2);
  font-family: 'Dancing Script', cursive;
  font-size: 1.5em;
  line-height: 0.9em;
}

#icon {
  color: rgba(255, 255, 255, 0.15);
  font-size: 80vmin;
  opacity: 0;
  pointer-events: none;
  transition: opacity 1200ms ease;
  z-index: 1;
}

/* -- YouTube Link Styles -- */

body.menu-toggled > .meta-link > span {
  color: rgb(30, 30, 30);
}

#source-link {
  bottom: 60px;
}

#source-link > i {
  color: rgb(94, 106, 210);
}

#yt-link > i {
  color: rgb(239, 83, 80);
}

.meta-link {
  align-items: center;
  backdrop-filter: blur(3px);
  background-color: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 6px;
  bottom: 10px;
  box-shadow: 2px 2px 2px rgba(0, 0, 0, 0.1);
  cursor: pointer;  
  display: inline-flex;
  gap: 5px;
  left: 10px;
  padding: 10px 20px;
  position: fixed;
  text-decoration: none;
  transition: background-color 400ms, border-color 400ms;
  z-index: 10000;
}

.meta-link:hover {
  background-color: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.meta-link > i, .meta-link > span {
  height: 20px;
  line-height: 20px;
}

.meta-link > span {
  color: white;
  font-family: "Rubik", sans-serif;
  transition: color 400ms;
}