[Isognoviastoma]

There is fundamental difference of how people think about www.

For some, it is execution environment for Web Apps, where backend-frontend split and communication over network is accidental, basically internal for App. Either run in latest version of one-three of top browsers or go away. Logic and security checks can be implemented in frontend in order to save server's electricity, because it will be run in browser anyway.

For some, it is Protocol which is implemented by User Agents to fetch resources exposed by Servers and display it to them. User Agent can be unmodified or heavily customized top browser, lynx, dillo, curl, telnet, specialized tools[1]. JS should be optional nearly always. It is them who is controlling what his computer is executing. From this thinking goes aversion to 30-seconds loading sites, lack of Progressive enhancement[2] going to the point of requiring JS to load blog post, emphasis on server-side validation.

From this difference come many misunderstanding and sometimes conflicts.

[1] https://weboob.org [2] https://en.wikipedia.org/wiki/Progressive_enhancement