node_modules/@titaniumnetwork-dev/ultraviolet/dist/sw.js

/*global UVServiceWorker,__uv$config*/
/*
 * Stock service worker script.
 * Users can provide their own sw.js if they need to extend the functionality of the service worker.
 * Ideally, this will be registered under the scope in uv.config.js so it will not need to be modified.
 * However, if a user changes the location of uv.bundle.js/uv.config.js or sw.js is not relative to them, they will need to modify this script locally.
 */
importScripts('uv.bundle.js');
importScripts('uv.config.js');
importScripts(__uv$config.sw || 'uv.sw.js');

const uv = new UVServiceWorker();

async function handleRequest(event) {
    if (uv.route(event)) {
        return await uv.fetch(event);
    }
    
    return await fetch(event.request)
}

self.addEventListener('fetch', (event) => {
    event.respondWith(handleRequest(event));
});