When you want to use external html file, here are some tips.

Working with Include Tag in Django

1. First, create a navbar.html using following code.

<nav>
    <ul>
        <li><a href="#">Home</a> </li>
        <li><a href="#">Contact</a> </li>
        <li><a href="#">News</a> </li>
    </ul>
</nav>

2. And then, modify code in base.html using include clause: {% include 'navbar.html' %}.

   Django(11)_Working_with_Include_Tag_in_Django_1.png

3. Refresh your page, you will see this result.
   Django(11)_Working_with_Include_Tag_in_Django_2.png

So far, you have learnt how to use external html file with include tag in Django. Hopefully, it helps.