what is ... syntax? (found in Angular2)
<p>I don't know if this syntax or symbol or whatever belongs to <code>Angular2</code> or something else...</p>

<p>but I wonder with, </p>

<p>what <strong><code>...</code></strong> syntax is and how it works behind the scene? </p>

<pre><code>ngOnChanges(...args:any[])
{
   console.log(args);
}
</code></pre>