Wait for #commento to be loaded before reinit

src/components/Commento.svelte

@@ -1,8 +1,9 @@
 <script>
+ import { tick } from 'svelte';
+
  export let pageId = null;
 
- $: {
-     if (pageId) {
+ async function changePageId(pageId) {
      if (typeof window !== 'undefined' && !window.commento) {
          // init empty object so commento.js script extends this with global functions
          window.commento = { };
@@ -19,11 +20,17 @@
          }
          document.getElementsByTagName('head')[0].appendChild(script)
      } else if (typeof window !== 'undefined' && window.commento) {
+         await tick();
          window.commento.reInit({
              pageId: pageId,
          })
      }
  }
+
+ $: {
+     if (pageId) {
+         changePageId(pageId);
+     }
  }
 </script>