swfcm.js

self.skipWaiting()

self.addEventListener('push', function (event) {
  const data = event.data.json()
  data.notification.data = data.data
  if (data.data.requireInteraction) {
    data.notification.requireInteraction = true
  }

  if (data.data.image) {
    data.notification.image = data.data.image;
  }

  data.notification.data.url = data.notification.click_action

  event.waitUntil(self.registration.showNotification(data.notification.title, data.notification))
  // Track open
  fetch('https://api.mailfire.io/v1/webpush/show/' + data.data.id, {
    method: 'post'
  })
})

self.addEventListener('notificationclick', function (event) {
  event.notification.close()

  // Show page
  event.waitUntil(
    clients
      .matchAll({
        type: 'window'
      })
      .then(function() {
        return clients.openWindow(event.notification.data.url)
      })
  )
  // Track click
  fetch('https://api.mailfire.io/v1/webpush/click/' + event.notification.data.id, {
    method: 'post'
  })
})