title: Generating thumbnail of a pdf using PDF.js
body: <p>I would like to generate a thumbnail from a pdf file using PDF.js, but it isn't like anothers js that have just one file and all needed to include the js in your project is to write:</p>
  
  <pre><code>&lt;script src="any.js"&gt;&lt;/script&gt;
  </code></pre>
  
  <p>How can I use PDF.js in my project? I'm using PHP in backend.</p>