Rocket.Chat/apps/meteor/client/serviceWorker.ts

const KEY = 'sw_last_reload';
const RELOAD_WINDOW = 1000 * 10;

function reload() {
	const lastReload = localStorage.getItem(KEY);

	if (lastReload) {
		const last = Date.parse(lastReload);

		if (!isNaN(last)) {
			const elapsed = Date.now() - last;

			if (elapsed < RELOAD_WINDOW) {
				return;
			}
		}
	}

	localStorage.setItem(KEY, new Date().toISOString());
	console.log('service worker: reloading to activate');
	window.location.reload();
}

if ('serviceWorker' in navigator) {
	navigator.serviceWorker
		.register('/enc.js', {
			scope: '/',
		})
		.then((reg) => {
			if (reg.active) {
				console.log('service worker: installed');
				if (!navigator.serviceWorker.controller) {
					reload();
				}
			}
		})
		.catch((err) => {
			console.log(`registration failed: ${err}`);
		});
}