JSFiddle - React, Tailwind, and code Playground

HTML

<script src="//cdnjs.cloudflare.com/ajax/libs/rxjs/2.3.20/rx.min.js"></script>
<pre class="console">
</pre>

JavaScript

function log (str) {
    console.log(str);
    $('.console').append(str + "\n");
}

var a = Rx.Observable.from([1,2,3,4,5,6,7,8]);

log("-------------1");
a.subscribe(function(x) { log(x); });
log("-------------2");
a.subscribe(function(x) { log(x); });