sw.js

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`51cb47e7` 2026-03-26 Pavel Safronov	1	/**
	2	* Word Waltz — Service Worker
	3	*
	4	* Handles incoming Web Push events and notification clicks.
	5	* Registered from notifications.ts at runtime.
	6	*/
	7
	8	/* global self, clients */
	9
	10	// Derive the base icon path from the SW's own location so it works both on
	11	// localhost (scope /) and on GitLab Pages (scope /word-waltz/).
	12	const BASE = new URL('./', self.location.href).href; // e.g. "/word-waltz/"
	13
	14	self.addEventListener('push', (event) => {
	15	const data = event.data?.json() ?? {};
	16	const title = data.title ?? 'Word Waltz';
	17	const options = {
	18	body: data.body ?? "It's your turn!",
	19	icon: `${BASE}apple-touch-icon.png`,
	20	badge: `${BASE}favicon-32x32.png`,
	21	tag: 'word-waltz-turn', // replace previous notification
	22	renotify: true,
	23	data: { url: data.url ?? BASE },
	24	};
	25	event.waitUntil(self.registration.showNotification(title, options));
	26	});
	27
	28	self.addEventListener('notificationclick', (event) => {
	29	event.notification.close();
	30	const target = event.notification.data?.url ?? BASE;
	31	event.waitUntil(
	32	clients
	33	.matchAll({ type: 'window', includeUncontrolled: true })
	34	.then((list) => {
	35	// Focus an existing tab that is on the same origin+scope
	36	for (const c of list) {
	37	if (c.url.startsWith(BASE) && 'focus' in c) return c.focus();
	38	}
	39	return clients.openWindow(target);
	40	}),
	41	);
	42	});