title: how to display .xls or word file in ngx-doc-viewer angular 8?
body: <p>I want to display .xls or word in file my previewer.</p>
  <p>I am using ngx-doc-viewer.</p>
  <p>can anyone tell me how can i do this?</p>
  <p>html code for previewer:</p>
  <pre><code>           &lt;ngx-doc-viewer [viewerUrl]=&quot;'https://docs.google.com/gview?url=%URL%&amp;embedded=true'&quot; 
             [url]=&quot;path&quot;viewer=&quot;url&quot;&gt;
             &lt;/ngx-doc-viewer&gt;
      
     
      -in [url] i had given path of my server folder
  </code></pre>