整理した

src/client/app/common/scripts/check-for-update.ts

@@ -0,0 +1,33 @@
+import MiOS from '../mios';
+import { version as current } from '../../config';
+
+export default async function(mios: MiOS, force = false, silent = false) {
+	const meta = await mios.getMeta(force);
+	const newer = meta.version;
+
+	if (newer != current) {
+		localStorage.setItem('should-refresh', 'true');
+		localStorage.setItem('v', newer);
+
+		// Clear cache (serive worker)
+		try {
+			if (navigator.serviceWorker.controller) {
+				navigator.serviceWorker.controller.postMessage('clear');
+			}
+
+			navigator.serviceWorker.getRegistrations().then(registrations => {
+				registrations.forEach(registration => registration.unregister());
+			});
+		} catch (e) {
+			console.error(e);
+		}
+
+		if (!silent) {
+			alert('%i18n:common.update-available%'.replace('{newer}', newer).replace('{current}', current));
+		}
+
+		return newer;
+	} else {
+		return null;
+	}
+}