Fireship: htmx in 100 seconds ( www.youtube.com )
htmx is a very different way of developing your web application. You can define a lot of behaviour inside your HTML with the new attributed added by htmx. This allows you to build an interactive website without using any JavaScript. You do need a REST API that returns HTML though....
Microfrontends using single-spa ( youtu.be )
A video to understand how single-spa works