function registerValidSW()

in src/registerServiceWorker.js [57:88]

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

function registerValidSW(swUrl) {
  navigator.serviceWorker &&
    navigator.serviceWorker
      .register(swUrl)
      .then((registration) => {
        registration.onupdatefound = () => {
          const installingWorker = registration.installing;
          installingWorker.onstatechange = () => {
            if (installingWorker.state === "installed") {
              if (
                navigator.serviceWorker &&
                navigator.serviceWorker.controller
              ) {
                // At this point, the old content will have been purged and
                // the fresh content will have been added to the cache.
                // It's the perfect time to display a "New content is
                // available; please refresh." message in your web app.
                console.log("New content is available; please refresh.");
              } else {
                // At this point, everything has been precached.
                // It's the perfect time to display a
                // "Content is cached for offline use." message.
                console.log("Content is cached for offline use.");
              }
            }
          };
        };
      })
      .catch((error) => {
        console.error("Error during service worker registration:", error);
      });
}