PackageHelper/www/sw.js

/* 
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 */

var cachename = "v1.5.0_0";

self.addEventListener('fetch', (event) => {
    event.respondWith(
            caches.match(event.request).then((resp) => {
        return resp || fetch(event.request).then((response) => {
            return caches.open(cachename).then((cache) => {
                try {
                    // only cache map data
                    if (event.request.url.includes("maps.netsyms.net")) {
                        cache.put(event.request, response.clone());
                    }
                } catch (ex) {

                }
                return response;
            });
        });
    })
            );
});
//
//self.addEventListener('install', function (event) {
//    event.waitUntil(
//            caches.open(cachename).then((cache) => {
//        return cache.addAll([
//            "https://maps.netsyms.net/styles/osm-liberty/style.json",
//            "https://maps.netsyms.net/styles/klokantech-terrain/style.json",
//            "https://maps.netsyms.net/styles/fiord-color/style.json",
//            "https://maps.netsyms.net/styles/oled-black/style.json"
//        ]);
//    }));
//});