cse110-fa22-group29/source/sw.js
2022-12-02 03:24:08 +00:00

64 lines
2.2 KiB
JavaScript

const CACHE_NAME = "food-journal-v1";
const ASSETS = [
"index.html",
"ReviewDetails.html",
"CreatePage.html",
"static/CoveredByYourGrace-Regular.ttf",
"static/CreatePage.css",
"static/Form.css",
"static/homepage.css",
"static/ReviewDetails.css",
"assets/images/0-star.svg",
"assets/images/1-star.svg",
"assets/images/2-star.svg",
"assets/images/3-star.svg",
"assets/images/4-star.svg",
"assets/images/5-star.svg",
"assets/images/create_button.png",
"assets/images/default_plate.png",
"assets/images/delete_icon_for_interface.png",
"assets/images/edit_button_for_interface.png",
"assets/images/home_button_for_interface.png",
"assets/images/favicon.ico",
"assets/images/Logo.png",
"assets/images/search_button.png",
"assets/scripts/CreatePage.js",
"assets/scripts/localStorage.js",
"assets/scripts/main.js",
"assets/scripts/ReviewCard.js",
"assets/scripts/ReviewDetails.js"
];
/**
* Adds the install listener where the app assets are added to the cache
*/
self.addEventListener("install", async () => {
// open the cace
const cache = await caches.open(CACHE_NAME);
// add all elements in ASSETS to the cache, these are all the files requried for the app to run
await cache.addAll(ASSETS);
});
/**
* Adds an event listener on fetch events to serve cached resources while offline
* Uses a network first structure to prioritize fetching from network in case of app updates.
* If there are important updates, we want the user to get those if possible.
*/
self.addEventListener("fetch", (event) => {
// add a response to the fetch event
event.respondWith(caches.open(CACHE_NAME).then((cache) => {
// try to return a network fetch response
return fetch(event.request).then((fetchedResponse) => {
// if there is a response, add it to the cache
cache.put(event.request, fetchedResponse.clone());
// return the network response
return fetchedResponse;
}).catch(() => {
// If there is not a network response, return the cached response
// The ignoreVary option is used here to fix an issue where the service worker
// would not serve certain requests unless the page was refreshed at least once
return cache.match(event.request, {ignoreVary: true, ignoreSearch: true});
});
}));
});