https://davidwalsh.name/notifications-api

web-notifications-api.js

/**
 * Fires the web notification api. 
 */
if(window.Notification && Notification.permission !== "denied") {
	// status is "granted", if accepted by user
	Notification.requestPermission(function(status) {  
		let notify = new Notification('Title', {
			body: 'I am the body text!',

			// optional
			icon: '/path/to/icon.png' 
		});

		// close the notification
		notify.close();
	});
}