electron/docs/fiddles/features/notifications/renderer/renderer.js

const NOTIFICATION_TITLE = 'Title'
const NOTIFICATION_BODY = 'Notification from the Renderer process. Click to log to console.'
const CLICK_MESSAGE = 'Notification clicked!'

new Notification(NOTIFICATION_TITLE, { body: NOTIFICATION_BODY })
  .onclick = () => document.getElementById('output').innerText = CLICK_MESSAGE