export function register()

in tools/CCPLogParser/src/serviceWorker.js [23:55]

• 22 lines of code
• 5 McCabe index (conditional complexity)

        export function register(config) {
            if (process.env.NODE_ENV === 'production' && 'serviceWorker' in navigator) {
                // The URL constructor is available in all browsers that support SW.
                const publicUrl = new URL(process.env.PUBLIC_URL, window.location.href);
                if (publicUrl.origin !== window.location.origin) {
                    // Our service worker won't work if PUBLIC_URL is on a different origin
                    // from what our page is served on. This might happen if a CDN is used to
                    // serve assets; see https://github.com/facebook/create-react-app/issues/2374
                    return;
                }
                
                window.addEventListener('load', () => {
                    const swUrl = `${process.env.PUBLIC_URL}/service-worker.js`;
                    
                    if (isLocalhost) {
                        // This is running on localhost. Let's check if a service worker still exists or not.
                        checkValidServiceWorker(swUrl, config);
                        
                        // Add some additional logging to localhost, pointing developers to the
                        // service worker/PWA documentation.
                        navigator.serviceWorker.ready.then(() => {
                            console.log(
                                'This web app is being served cache-first by a service ' +
                                'worker. To learn more, visit https://bit.ly/CRA-PWA'
                                );
                            });
                        } else {
                            // Is not localhost. Just register service worker
                            registerValidSW(swUrl, config);
                        }
                    });
                }
            }