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<!DOCTYPE html>
<html>
<head>
<script src="//cdnjs.cloudflare.com/ajax/libs/rxjs/2.3.22/rx.all.js"></script>
  <meta charset="utf-8">
  <title>JS Bin</title>
</head>
<body>
    <button id="button">Click me</button>
</body>
</html>
 
var Observable = Rx.Observable;
var button = document.getElementById('button');
var handler = function(e) {
    alert('clicked');
    button.removeEventListener('click', handler);
};
button.addEventListener('click', handler);
// var clicks = Observable.fromEvent(button, 'click');
// var subscription = 
//  clicks.forEach(
//      function onNext(e) {
//          alert('clicked');
//          subscription.dispose();
//      },
//      function onError(error) {                       
//          console.log('ERROR!');
//      },
//      function onCompleted() {
//          console.log("done");
//      });
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amitjain1307pro
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