Function respondToPreloadError

packages/app/src/preload-error.ts:48–73

(
  env: PreloadErrorEnvironment,
  error: unknown,
)

  | "reported";

export const respondToPreloadError = async (
  env: PreloadErrorEnvironment,
  error: unknown,
): Promise<PreloadErrorOutcome> => {
  if (await env.probeServer()) {
    // The origin answers, so this is a stale chunk rather than a dead server.
    // Exactly one reload per session, so a chunk that stays missing cannot
    // turn into a reload loop — it gets reported instead.
    if (env.readReloadFlag()) {
      env.report(error);
      return "reported";
    }
    env.writeReloadFlag();
    env.reload();
    return "reloaded";
  }

  env.showDisconnected();
  for (;;) {
    await env.delay(RECONNECT_POLL_MS);
    if (await env.probeServer()) {
      env.reload();
      return "reconnected";
    }
  }
};

/** Vite dispatches the failure as `CustomEvent<{ payload: Error }>`. */
const preloadErrorPayload = (event: Event): unknown =>