HTMX is a new library that allows you to create modern responsive web apps without writing loads of custom javascript or using a bulky frontend framework like Vue or React.

From the HTMX website:

HTMX gives you access to AJAX, CSS Transitions, WebSockets and Server Sent Events directly in HTML, using attributes, so you can build modern user interfaces with the simplicity and power of hypertext.

Here's a good series of videos from BugBytes on YouTube which shows how to integrate HTMX into your Django project and all of the great things you can do with it: https://youtube.com/playlist?list=PL-2EBeDYMIbRByZ8GXhcnQSuv2dog4JxY