reactjs service worker update

Question

I have a PWA made by create-react-app. I have service worker enabled as by default.

import registerServiceWorker from './registerServiceWorker'
import App from './App'
ReactDOM.render(
  <App />
  , document.getElementById('root'))
registerServiceWorker()

On every publish I change package version, but my service-worker doesn't update.

I have tried with function

import { unregister } from './registerServiceWorker';
unregister()

as described here https://github.com/facebook/create-react-app

And this

navigator.serviceWorker.getRegistrations()
  .then(registrationsArray => {
    if (registrationsArray.length > 0) {
        registrationsArray[0].update()
    }
  })

It doesn't work, what is my mistake? What is wrong? Thanks

jfbloom22 · Answer 1 · 2020-02-17T13:56:30.263

Update to react-scripts ^3.2.0. Verify that you have the new version of serviceWorker.ts or .js. The old one was called registerServiceWorker.ts and the register function did not accept a configuration object. Here is the new one: https://github.com/facebook/create-react-app/blob/3190e4f4a99b8c54acb0993d92fec8a859889a28/packages/cra-template/template/src/serviceWorker.js Note that this solution only works well if you are Not lazy-loading.

then in index.tsx:

  serviceWorker.register({
    onUpdate: registration => {
      alert('New version available!  Ready to update?');
      if (registration && registration.waiting) {
        registration.waiting.postMessage({ type: 'SKIP_WAITING' });
      }
      window.location.reload();
    }
  });

The latest version of the ServiceWorker.ts register()function accepts a config object with a callback function where we can handle upgrading. If we post a message SKIP_WAITING this tells the service worker to stop waiting and to go ahead and load the new content after the next refresh. In this example I am using a javascript alert to inform the user. Please replace this with a custom toast.

The reason this postMessage function works is because under the hood CRA is using workbox-webpack-plugin which includes a SKIP_WAITING listener.

More About Service Workers

good guide: https://redfin.engineering/how-to-fix-the-refresh-button-when-using-service-workers-a8e27af6df68

CRA issue discussing service worker cache: https://github.com/facebook/create-react-app/issues/5316

If you are not using CRA, you can use workbox directly: https://developers.google.com/web/tools/workbox

reactjs service worker update

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