how to creating responsive web site with out bootstrap code example
Example: how to make a responsive website boots
<ul class="nav nav-pills flex-column">
<li class="nav-item">
<a class="nav-link active" href="#">Active</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Link</a>
</li>
<!-- more links -->
</ul>