JS Service Worker for Push Notification

sw.js

// Show notification if some data pushed to the service worker
self.addEventListener('push', event => {
    // Get the data from the push message
    const notification = event.data.json();

    // Show the notification
    event.waitUntil(self.registration.showNotification(notification.title, {
        body: notification.body,
        icon: 'icon.png',
        data: {
            notifURL: notification.url
        }
    }))
})

// Handles click on notification
self.addEventListener('notificationclick', event => {
    event.waitUntil(clients.openWindow(event.notification.data.notifURL))
})

// Notification data sample
const notification = {
    title: 'Notification Title',
    body: 'Notification Body',
    url: '/?am_i_awesome=true'
}