What does registerServiceWorker do in React JS?

The service worker is a web API that helps you cache your assets and other files so that when the user is offline or on slow network, he/she can still see results on the screen, as such, it helps you build a better user experience, that's what you should know about service worker's for now. It's all about adding offline capabilities to your site.

React creates a service worker for you without your configuration by default. To learn more;

  • Service Workers, MDN
  • Service Workers, Google Web Fundamentals
  • Simple offline site using service worker, CSS Tricks
  • Server worker: A case study, Smashing Magazine