PWA-ni oflayn rejimda saqlangan versiyani yuklash uchun, ammo tarmoq aloqasi mavjud bo'lganda eng so'nggi ma'lumotlarni yuklash uchun, xizmat ishchisida "Kache, Falling Back to Network" deb nomlangan strategiyani amalga oshirishingiz mumkin. Ushbu strategiya avval so'ralgan resurs uchun keshni tekshirishni, agar u keshda topilmasa, uni tarmoqdan olishni o'z ichiga oladi. \ Ushbu strategiyani amalga oshirish uchun, siz tarmoq so'rovlarini ushlab turish va ularga kesh yordamida javob berish uchun xizmat ishchisida "fetch" hodisadan foydalanishingiz mumkin. Quyidagi misolni ko'rib chiqing: ``` self.addEventListener('fetch function',(event) {event.respond.With caches.event.request).((((((((((
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