This lesson covers how to toggle an observable on and off from another observable by showing how to use a checkbox as a toggle for a stream of data.

<!DOCTYPE html>

<html>

<head>

<script src="https://npmcdn.com/@reactivex/rxjs@5.0.0-alpha.8/dist/global/Rx.js"></script>

  <meta charset="utf-8">

  <title>JS Bin</title>

</head>

<body>

  <input type="checkbox" id="toggle">

  <div id="display"></div>

</body>

</html>
const display = document.querySelector('#display');

const toggle = document.querySelector('#toggle');

const source$ = Rx.Observable.interval(100)

  .map(() => '.');

const checked$ = Rx.Observable.fromEvent(toggle, 'change')

  .map(e => e.target.checked);

const sourceThatStop$ = source$.takeUntil(checked$);

checked$

  .filter( flag => flag === true)

  .switchMapTo( sourceThatStop$ )

  .subscribe( (x) => {

    display.innerHTML += x;

});

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