1 | /*
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2 | Copyright 2018 Google LLC
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3 |
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4 | Use of this source code is governed by an MIT-style
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5 | license that can be found in the LICENSE file or at
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6 | https://opensource.org/licenses/MIT.
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7 | */
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8 | import '../_version.js';
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9 | const SUBSTRING_TO_FIND = '-precache-';
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10 | /**
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11 | * Cleans up incompatible precaches that were created by older versions of
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12 | * Workbox, by a service worker registered under the current scope.
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13 | *
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14 | * This is meant to be called as part of the `activate` event.
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15 | *
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16 | * This should be safe to use as long as you don't include `substringToFind`
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17 | * (defaulting to `-precache-`) in your non-precache cache names.
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18 | *
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19 | * @param {string} currentPrecacheName The cache name currently in use for
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20 | * precaching. This cache won't be deleted.
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21 | * @param {string} [substringToFind='-precache-'] Cache names which include this
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22 | * substring will be deleted (excluding `currentPrecacheName`).
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23 | * @return {Array<string>} A list of all the cache names that were deleted.
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24 | *
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25 | * @private
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26 | * @memberof workbox-precaching
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27 | */
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28 | const deleteOutdatedCaches = async (currentPrecacheName, substringToFind = SUBSTRING_TO_FIND) => {
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29 | const cacheNames = await self.caches.keys();
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30 | const cacheNamesToDelete = cacheNames.filter((cacheName) => {
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31 | return (cacheName.includes(substringToFind) &&
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32 | cacheName.includes(self.registration.scope) &&
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33 | cacheName !== currentPrecacheName);
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34 | });
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35 | await Promise.all(cacheNamesToDelete.map((cacheName) => self.caches.delete(cacheName)));
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36 | return cacheNamesToDelete;
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37 | };
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38 | export { deleteOutdatedCaches };
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