owlboard-svelte/src/lib/navigation/loading.svelte

<script>
  import { fade } from 'svelte/transition';
</script>

<div id="container" in:fade={{ delay: 150, duration: 250 }} out:fade={{ duration: 250 }}>
  <div class="spinner" />
  <p>Loading...</p>
</div>

<style>
  @keyframes spinner {
    0% {
      transform: translate3d(-50%, -50%, 0) rotate(0);
    }
    100% {
      transform: translate3d(-50%, -50%, 0) rotate(360deg);
    }
  }
  .spinner::before {
    animation: 1.5s linear infinite spinner;
    animation-play-state: inherit;
    border: solid 5px var(--overlay-island-bg-color);
    border-bottom-color: white;
    border-radius: 50%;
    content: '';
    height: 40px;
    width: 40px;
    position: absolute;
    top: 30%;
    margin: auto;
    transform: translate3d(-50%, -50%, 0);
    will-change: transform;
  }
  #container {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    margin: auto;
    background-color: var(--overlay-island-bg-color);
    border-radius: 15px;
    padding: 20px;
    padding-bottom: 1px;
    min-width: 90px;
    max-width: 90px;
    box-shadow: var(--box-shadow);
  }
  p {
    padding-top: 50px;
    font-weight: bolder;
    overflow-wrap: normal;
    color: var(--island-text-color);
  }
</style>