feat(pwa): ✨ add new "network first" fetch strategy

src/serviceworker/src/fetch_strategy.ts

@@ -26,8 +26,32 @@ export class FetchStrategy {
 		return fetched
 	}
 
-		// Get fastest
-		return Promise.any([cachedOrError, fetchedAndCached])
+	static async networkFirst(
+		cache: Cache,
+		{ request, preloadResponse }: Pick<
+			FetchEvent,
+			'request' | 'preloadResponse'
+		>,
+		cacheQueryOptions?: CacheQueryOptions | undefined,
+	): Promise<Response> {
+		try {
+			// Fetch and cache
+			const fetched = await this.networkOnly({ request, preloadResponse })
+			cache.put(request, fetched.clone())
+			return fetched
+		} catch (cause) {
+			// Get cache
+			const cached = await cache.match(request, cacheQueryOptions)
+
+			if (cached) {
+				return cached
+			}
+
+			throw new Error(
+				`no cache available for the requested url "${request.url}"`,
+				{ cause },
+			)
+		}
 	}
 
 	static async networkOnly(