semaphore/routes/_components/LoadingMask.html

<div class="loading-container">
  {{#if show}}
  <div transition:fade class="loading-mask">
    <LoadingSpinner maskStyle="true"/>
  </div>
  {{/if}}
</div>
<style>
  .loading-container {
    left: 0;
    right: 0;
    top: 0;
    bottom: 0;
    position: fixed;
    pointer-events: none;
    z-index: 100;
  }
  .loading-mask {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--mask-bg);
    opacity: 0.6;
    pointer-events: auto;
  }
</style>
<script>
  import { fade } from 'svelte-transitions'
  import LoadingSpinner from './LoadingSpinner.html'

  export default {
    transitions: {
      fade
    },
    components: {
      LoadingSpinner
    }
  }
</script>