What does registerServiceWorker do in React JS?

Question

I\'m a newbie in React and I was wondering what is the purpose of registerServiceWorker() in the following code?

import React from \'react\';
import ReactDOM         


        

Answer 1

The service worker is to use the website data offline in case there is no network, it's like making PWA. Refer to this link PWA to know more about implementation and how to use registerServiceWorker().