title: How to download files from storage
body: <p>I have files in my firebase storage. I want to be able to download a file button click. </p>
  
  <p>For instance </p>
  
  <pre><code>&lt;button (click)="download()"&gt;&lt;/button&gt;
  </code></pre>
  
  <p>And component class : </p>
  
  <pre><code>download(){
     const file_url = 'audio/7ejhsjd';
     // Change file name
     //download file
  }
  </code></pre>
  
  <p>I would like to change the filename (metadata) of file then download it.</p>
  
  <p>How can I achieve this in JavaScript or TypeScript?</p>