sw.js

var cache = 'javascripture.20'; // search summary highlighting

self.addEventListener('install', function(e) {
	e.waitUntil( caches.open( cache ).then(function(cache) {
		return cache.addAll([
			'/',
			'/index.html',
			'/css/layout.css',
			'/manifest.json',
			'/javascripture.svg',
			//libs
			'lib/MorphCodes.js',
			'lib/MorphParse.js',

			//data
			'data/bible.js',
			'data/extra-dictionary.js',
			'data/strongs-dictionary.js',
			'data/strongs-greek-dictionary.js',
			'data/kjvdwyer7.js',
			'data/web3.js',
			'data/strongsObjectWithFamilies2.js',
			'data/hebrew.js',
			'data/greek4.js',
			'data/crossReferences.js',
			'data/morphology.js',
			'data/literalConsistent.js',
			'data/literalConsistentExtra.js',

			//api - so that search works offline?
			'api/searchApi.js',

			//modules
			'build/bundle.js',

			//workers
			'workers/worker.js',
		]);

	}));
});

self.addEventListener('fetch', function(event) {
	event.respondWith(
		caches.match(event.request).then(function(response) {
			return response || fetch(event.request);
		})
	);
});

// Delete unused cache
self.addEventListener('activate', function( event ) {
	const channel = new BroadcastChannel('sw-messages');
	channel.addEventListener('message', event => {
		channel.postMessage( { versionNumber: cache } );
	});

	var cacheWhitelist = [ cache ];
	event.waitUntil(
		caches.keys().then(function( keyList ) {
			return Promise.all(keyList.map(function( key ) {
				if (cacheWhitelist.indexOf( key ) === -1) {
					return caches.delete( key );
				}
			}));
		})
	);
});