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. htmx is small (~14k min.gz’d), dependency-free, extendable, IE11 compatible & has reduced code base sizes by 67% when compared with react. Ideally, all of the Javascript crap you'd have to write yourself is already done for you.

Github: https://github.com/bigskysoftware/htmx

May as well download it from the CDN and store it locally.

Seems like all of the attributes start with hx-.