JSFiddle - React, Tailwind, and code Playground

by Dogbert

HTML

<div class="modal">
  <div class="inner">
    <h1>
      Test Content!
    </h1>
  </div>
</div>

SCSS

.modal {
  position: fixed;
  left: 0;
  top: 0;
  width: 100vh;
  height: 100vh;
  align-items: center;
  justify-content: center;
  .inner {
    background: violet;
    padding: 10px;
    transform: scale(0.2);
    transform-origin: 50% 50%;
    transition: .2s all;
  }
  &.open {
    display: flex;
    .inner {
      transform: scale(1);
    }
  }
}

JavaScript

const $modal = document.querySelector('.modal');

setInterval(() => {
  $modal.classList.toggle("open");
}, 3000)