htmx allows you to access AJAX, WebSockets and Server Sent Events directly in HTML, using attributes, so you can build modern user interfaces with the simplicity and power of hypertext

Source: htmx - high power tools for html

This is interesting and reminds me of the old school Rails UJS JavaScript, but I wonder how quickly it falls apart as a real-world approach for everything in an app. Also it makes me wonder if it works with Turbolinks. 😉