fbbf8cf16b
fbshipit-source-id: b6fc29740c6875d2e78953b8a7123890a67930f2 Co-authored-by: Sebastian McKenzie <sebmck@fb.com> Co-authored-by: John Knox <jknox@fb.com> Co-authored-by: Emil Sjölander <emilsj@fb.com> Co-authored-by: Pritesh Nandgaonkar <prit91@fb.com>
36 lines
980 B
JavaScript
36 lines
980 B
JavaScript
/**
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* Copyright 2018-present Facebook.
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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* @format
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*/
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const CACHE_NAME = 'v1';
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self.addEventListener('message', e => {
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if (e.data.precachedIcons) {
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caches.open(CACHE_NAME).then(cache => cache.addAll(e.data.precachedIcons));
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}
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});
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self.addEventListener('fetch', function(event) {
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if (event.request.url.startsWith('https://external.xx.fbcdn.net/assets/')) {
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event.respondWith(
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// Cache falling back to the network
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caches.match(event.request).then(cacheResponse => {
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return (
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cacheResponse ||
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fetch(event.request).then(response => {
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const clone = response.clone();
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// write to cache
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caches
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.open(CACHE_NAME)
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.then(cache => cache.put(event.request, clone));
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return response;
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})
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);
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}),
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);
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}
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});
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