title: file Input Event type in Angular
body: <p>So I have been using Angular and Typescript for a long time. I cannot seem to find out what the Type for an Input file is.</p>
  
  <p>For example:</p>
  
  <pre><code>&lt;input type="file" (change)="fileChangeEvent($event)"&gt;
  
  fileChangeEvent(e:?????){}
  </code></pre>
  
  <p>All examples purely just uses event without any type, and I am curious to know if such a type even exists. </p>