Notification request promise

Notification-request-promise.js

Notification
  .requestPermission()
  .then((permission) => {
    if (permission !== 'granted') throw new Error('No access!');
  })
  .then(() => {
    console.log('We have an access!');
    // Handle granted permission here
  })
  .catch((err) => {
    console.log(err);
    // Handle denied permission here
  });