authentication is trivial and session cookie based, as was common before JSON-based apps became the norm. all mature web frameworks have this form of authentic

authentication is trivial and session cookie based, as was common before JSON-based apps became the norm. all mature web frameworks have this form of authentication baked in or available as a standard library. validation is also trivial: you do can do it server side as was normal for many years. htmx also allows you to plug in to the HTML5 client-side validation API if you'd like: https://htmx.org/docs/#validation https://htmx.org/docs/#validation there is no need for a complex front end framework for the vast majority of web applications. something like twitter or gmail could easily be built using a hypermedia-oriented approach, but when they were built hypermedia hadn't been advanced in nearly two decades. now it has.