django applying a style class based on a conditional

I have added class on if condition by this way....

<li class="nav-item {% if app_url == '/' %} active{% endif %}">

I normally go for:

<div class="item-image{% if foo %} own-image{% endif %}">...</div>

but switching out the entire div tag may be more readable.

Either way I'd do the styling with another class, not with inline css.