// source https://jsbin.com/qoharusepi

index.html

<button onclick="notifyMe()">
  Notify me!
</button>
<script id="jsbin-javascript">
// request permission on page load
document.addEventListener('DOMContentLoaded', function () {
  if (Notification.permission !== "granted")
    Notification.requestPermission();
});

function notifyMe() {
  if (!Notification) {
    alert('Desktop notifications not available in your browser. Try Chromium.'); 
    return;
  }

  if (Notification.permission !== "granted")
    Notification.requestPermission();
  else {
    var notification = new Notification('Nike Shoes', {
      icon: 'http://www.superoffers.com/assets/base-s852f242db1-782fe0ddc0dd069e56853a81d7cd9a8e976e14cdb2234b2a55c82ac67c084ec0.png',
      body: "Check out our latest offers on Nike Shoes!",
    });

    notification.onclick = function () {
      window.open("http://superoffers.com");      
    };
  }
}
</script>


<script id="jsbin-source-javascript" type="text/javascript">// request permission on page load
document.addEventListener('DOMContentLoaded', function () {
  if (Notification.permission !== "granted")
    Notification.requestPermission();
});

function notifyMe() {
  if (!Notification) {
    alert('Desktop notifications not available in your browser. Try Chromium.'); 
    return;
  }

  if (Notification.permission !== "granted")
    Notification.requestPermission();
  else {
    var notification = new Notification('Nike Shoes', {
      icon: 'http://www.superoffers.com/assets/base-s852f242db1-782fe0ddc0dd069e56853a81d7cd9a8e976e14cdb2234b2a55c82ac67c084ec0.png',
      body: "Check out our latest offers on Nike Shoes!",
    });

    notification.onclick = function () {
      window.open("http://superoffers.com");      
    };
  }
}
</script>

jsbin.qoharusepi.js

// request permission on page load
document.addEventListener('DOMContentLoaded', function () {
  if (Notification.permission !== "granted")
    Notification.requestPermission();
});

function notifyMe() {
  if (!Notification) {
    alert('Desktop notifications not available in your browser. Try Chromium.'); 
    return;
  }

  if (Notification.permission !== "granted")
    Notification.requestPermission();
  else {
    var notification = new Notification('Nike Shoes', {
      icon: 'http://www.superoffers.com/assets/base-s852f242db1-782fe0ddc0dd069e56853a81d7cd9a8e976e14cdb2234b2a55c82ac67c084ec0.png',
      body: "Check out our latest offers on Nike Shoes!",
    });

    notification.onclick = function () {
      window.open("http://superoffers.com");      
    };
  }
}