JSFiddle - React, Tailwind, and code Playground

HTML

<button onclick="notifyMe();">
  Notify me!
</button>

JavaScript

function notifyMe() {
  if (Notification.permission !== "granted")
    Notification.requestPermission();
  else {
    var notification = new Notification('Notification title', {
      icon: 'http://cdn.sstatic.net/stackexchange/img/logos/so/so-icon.png',
      body: "You've been notified!",
    });

    notification.onclick = function () {
      parent.focus();
      window.focus(); //just in case, older browsers
      this.close();
    };
    
  }
}