How to detect if Moment js is loaded from CDN
<p>I want to create a fallback if moment js is not loaded from CDN. I couldn't find any helpful resource online, neither on <a href="https://momentjs.com" rel="noreferrer">momentjs.com</a> to detect if Moment js is present. </p>

<p>Here's my code :</p>

<pre><code>&lt;script src="//cdnjs.cloudflare.com/ajax/libs/moment.js/2.10.3/moment.min.js"&gt;&lt;/script&gt;
&lt;script&gt;
    // If moment.js is not loaded, use the fallback
    if () { 
        document.write('&lt;script src="assets/plugins/moment/moment.min.js"&gt;&lt;\/script&gt;');
    }
&lt;/script&gt;
</code></pre>