Push a web notification to the browser.

Generate web-push VAPID keys .\node_modules\.bin\web-push.cmd generate-vapid-keys [--json]

Default config config/default.json:

{
  "webPush": {
    "publicKey": "",
    "privateKey": ""
  },
  "notifyDatabase": {
    "user": "",
    "host": "",
    "database": "",
    "password": "",
    "port": 5432
  }
}

• Desktop: the browser needs to be opened for the notification to show.
• Mobile: Even with the browser closed you will get the notification. However you will get a second notification saying the app has changed in the background.

If you're not willing to pay $99 for Apple Developer Program, then no notifications for Safari users

• Safari 7 (OS X 10.9 or later required) for testing,
• A website under HTTPS protocol,
• Apple Developer Program account for registering a Website Push ID
• Tutorial: samuil.hakoniemi.net
• Safari push notifications: developer.apple.com