registration.showNotification is not a function

Question

I'm using serviceworker-webpack-plugin to create a service worker in my reactjs apps.

I've followed the example to register the service worker in the main thread. I've learnt that Html5 Notification doesn't work on Android chrome, so I used registration.showNotification('Title', { body: 'Body.'}); instead of new Notification('...') to push notifications. But when I tested it on the desktop chrome, it throws this error

registration.showNotification is not a function

Is the registration.showNotification only available on Android chrome but not on the desktop?

public componentDidMount(){

    if ('serviceWorker' in navigator &&
        (window.location.protocol === 'https:' || window.location.hostname === 'localhost')
    ) {
        const registration = runtime.register();

        registerEvents(registration, {
            onInstalled: () => {

                registration.showNotification('Title', { body: 'Body.'});
            }
        })
    } else {
        console.log('serviceWorker not available')
    }
}

Answer 1

runtime.register() returns a JavaScript Promise, which is why you are getting a not a function error because Promises don't have a showNotification() method.

Instead, you'd have to chain a .then() callback to it in order to get the actual registration object (or use async/await, which is also cool).

runtime.register().then(registration => {
    registration.showNotification(...);
})

Answer 2

Below solution worked for me. Can try.

The main root cause of .showNotification() not firing is service worker. Service worker is not getting registered. So it wont call registration.showNotification() method.

• Add service-worker.js file to your project root directory

• You can download service-worker.js file from Link

Use below code to register service worker and fire registration.showNotification() method.

const messaging = firebase.messaging();
messaging.onMessage(function (payload) {
  console.log("Message received. ", payload);
            NotisElem.innerHTML = NotisElem.innerHTML + JSON.stringify(payload);
            //foreground notifications

            if ('serviceWorker' in navigator) {

                navigator.serviceWorker
                    .register('./service-worker.js', { scope: './' })
                    .then(function (registration) {
                        console.log("Service Worker Registered");
                        setTimeout(() => {
                            registration.showNotification(payload.data.title, {
                                body: payload.data.body,
                                data: payload.data.link
                            });
                            registration.update();
                        }, 100);
                    })
                    .catch(function (err) {
                        console.log("Service Worker Failed to Register", err);
                    })

     }
 });