This is a game of Connect 4, with the only JavaScript being that of HTMX, and on a static host. All other JavaScript is disallowed by the CSP (in a meta tag since I can't control headers on GitHub Pages). Check with Right Click → View Source!
            Note that a lot of the functionality is implemented through CSS. Your browser needs to
            support the :has selector for things like win detection to work.
            Additionally, I've made an
            explanation of how this was made
            on my blog.