excalidraw/src/excalidraw-app/pwa.ts

import { register as registerServiceWorker } from "../serviceWorker";
import { EVENT } from "../constants";

// On Apple mobile devices add the proprietary app icon and splashscreen markup.
// No one should have to do this manually, and eventually this annoyance will
// go away once https://bugs.webkit.org/show_bug.cgi?id=183937 is fixed.
if (
  /\b(iPad|iPhone|iPod)\b/.test(navigator.userAgent) &&
  !matchMedia("(display-mode: standalone)").matches
) {
  import(/* webpackChunkName: "pwacompat" */ "pwacompat");
}

registerServiceWorker({
  onUpdate: (registration) => {
    const waitingServiceWorker = registration.waiting;
    if (waitingServiceWorker) {
      waitingServiceWorker.addEventListener(
        EVENT.STATE_CHANGE,
        (event: Event) => {
          const target = event.target as ServiceWorker;
          const state = target.state as ServiceWorkerState;
          if (state === "activated") {
            window.location.reload();
          }
        },
      );
      waitingServiceWorker.postMessage({ type: "SKIP_WAITING" });
    }
  },
});