title: How to display pdf inside container of widget [flutter-web]
body: <p>I would like to open pdf file in my flutter-web project, as long as I know... when I open the pdf, it always navigates me to new tab, is there a way to display pdf inside container of widget flutter?
  So, far I only open the pdf file by doing this</p>
  <pre><code>html.window.open('http://xxxx.pdf',&quot;my_pdf&quot;);
  </code></pre>
  <p>I still didn't know how to put it inside widget flutter</p>