зеркало из https://github.com/MicrosoftEdge/Demos.git
114 строки
3.4 KiB
JavaScript
114 строки
3.4 KiB
JavaScript
const VERSION = 'v1';
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const CACHE_NAME = `wami-${VERSION}`;
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// Those are all the resources our app needs to work.
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// We'll cache them on install.
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const INITIAL_CACHED_RESOURCES = [
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'./',
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// CSS
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'./styles/buttons.css',
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'./styles/dialogs.css',
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'./styles/editor.css',
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'./styles/image-viewer.css',
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'./styles/images.css',
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'./styles/index.css',
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'./styles/layout.css',
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'./styles/list-of-flows.css',
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'./styles/reset.css',
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'./styles/step-chooser.css',
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'./styles/welcome.css',
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// JS
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'./app.js',
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'./flow-runner.js',
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'./ui.js',
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'./store.js',
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'./utils.js',
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'./image-viewer.js',
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'./steps.js',
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// 3rd party JS
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'https://cdn.jsdelivr.net/npm/wasm-imagemagick/dist/bundles/magickApi.js',
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// Images
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'./icons/add-images.png',
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'./icons/step-blur.png',
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'./icons/step-border.png',
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'./icons/step-brightness-contrast.png',
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'./icons/step-clone.png',
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'./icons/step-colorize.png',
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'./icons/step-crop.png',
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'./icons/step-edge.png',
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'./icons/step-flip.png',
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'./icons/step-flop.png',
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'./icons/step-grayscale.png',
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'./icons/step-negate.png',
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'./icons/step-paint.png',
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'./icons/step-polaroid.png',
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'./icons/step-posterize.png',
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'./icons/step-resize-exactly.png',
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'./icons/step-resize-height-if-larger.png',
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'./icons/step-resize-width-if-larger.png',
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'./icons/step-resize.png',
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'./icons/step-rotate.png',
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'./icons/step-scale.png',
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'./icons/step-sepia-tone.png',
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'./icons/step-sharpen.png',
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'./favicon-96.png',
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'./favicon-128.png',
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'./favicon-256.png',
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'./favicon-512.png',
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];
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// Add a cache-busting query string to the pre-cached resources.
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// This is to avoid loading these resources from the disk cache.
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const INITIAL_CACHED_RESOURCES_WITH_VERSIONS = INITIAL_CACHED_RESOURCES.map(path => {
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return `${path}?v=${VERSION}`;
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});
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// On install, fill the cache with all the resources we know we need.
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// Install happens when the app is used for the first time, or when a
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// new version of the SW is detected by the browser.
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// In the latter case, the old SW is kept around until the new one is
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// activated by a new client.
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self.addEventListener('install', event => {
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self.skipWaiting();
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event.waitUntil((async () => {
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const cache = await caches.open(CACHE_NAME);
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cache.addAll(INITIAL_CACHED_RESOURCES_WITH_VERSIONS);
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})());
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});
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// Activate happens after install, either when the app is used for the
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// first time, or when a new version of the SW was installed.
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// We use the activate event to delete old caches and avoid running out of space.
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self.addEventListener('activate', event => {
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event.waitUntil((async () => {
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const names = await caches.keys();
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await Promise.all(names.map(name => {
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if (name !== CACHE_NAME) {
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return caches.delete(name);
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}
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}));
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await clients.claim();
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})());
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});
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// Main fetch handler.
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// A cache-first strategy is used, with a fallback to the network.
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// The static resources fetched here will not have the cache-busting query
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// string. So we need to add it to match the cache.
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self.addEventListener('fetch', event => {
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// On fetch, go to the cache first, and then network.
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event.respondWith((async () => {
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const cache = await caches.open(CACHE_NAME);
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const cachedResponse = await cache.match(`${event.request.url}?v=${VERSION}`);
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if (cachedResponse) {
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return cachedResponse;
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} else {
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const fetchResponse = await fetch(event.request);
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cache.put(event.request, fetchResponse.clone());
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return fetchResponse;
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}
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})());
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});
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