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<!DOCTYPE html>
<html>
<head>
<script src="https://cdnjs.cloudflare.com/ajax/libs/rxjs/2.3.22/rx.all.js"></script>
<script src="//code.jquery.com/jquery-2.1.0.min.js"></script>
  <title>JS Bin</title>
  <script src="//cdn.jsdelivr.net/rsvp/3.0.6/rsvp.js"></script>
</head>
<body>
  <input id="input" type="text">
</body>
</html>
 
function handler(n) {
    // Handle next calls
    if (n.kind === 'N') {
        console.log('Next: ' + n.value);
    }
​
    // Handle error calls
    if (n.kind === 'E') {
        console.log('Error: ' + n.exception);
    }
​
    // Handle completed
    if (n.kind === 'C') {
        console.log('Completed');
    }
}
​
Rx.Observer.fromNotifier(handler).onNext(42);
// => Next: 42
​
Rx.Observer.fromNotifier(handler).onError(new Error('error!!!'));
// => Error: Error: error!!!
​
Rx.Observer.fromNotifier(handler).onCompleted();
// => false
Output

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