mirror of
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55 lines
1.6 KiB
Text
55 lines
1.6 KiB
Text
/*
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Copyright 2018 Google LLC
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Use of this source code is governed by an MIT-style
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license that can be found in the LICENSE file or at
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https://opensource.org/licenses/MIT.
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*/
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import '../_version.js';
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// Give TypeScript the correct global.
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declare let self: ServiceWorkerGlobalScope;
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const SUBSTRING_TO_FIND = '-precache-';
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/**
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* Cleans up incompatible precaches that were created by older versions of
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* Workbox, by a service worker registered under the current scope.
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*
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* This is meant to be called as part of the `activate` event.
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*
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* This should be safe to use as long as you don't include `substringToFind`
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* (defaulting to `-precache-`) in your non-precache cache names.
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*
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* @param {string} currentPrecacheName The cache name currently in use for
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* precaching. This cache won't be deleted.
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* @param {string} [substringToFind='-precache-'] Cache names which include this
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* substring will be deleted (excluding `currentPrecacheName`).
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* @return {Array<string>} A list of all the cache names that were deleted.
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*
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* @private
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* @memberof workbox-precaching
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*/
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const deleteOutdatedCaches = async (
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currentPrecacheName: string,
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substringToFind: string = SUBSTRING_TO_FIND,
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): Promise<string[]> => {
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const cacheNames = await self.caches.keys();
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const cacheNamesToDelete = cacheNames.filter((cacheName) => {
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return (
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cacheName.includes(substringToFind) &&
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cacheName.includes(self.registration.scope) &&
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cacheName !== currentPrecacheName
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);
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});
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await Promise.all(
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cacheNamesToDelete.map((cacheName) => self.caches.delete(cacheName)),
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);
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return cacheNamesToDelete;
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};
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export {deleteOutdatedCaches};
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