You say "no solution" like form validation isn't one of the most common things that all web forms do today. Solutions exist. What I'm trying to say is instead of browser building adding high-level functionality like this they should simple continue to provide better ways for us to do it ourselves.

If you code for Windows or Mac OS, you get standard controls, and they do come with a lot of functionality, but ultimately it's still just building blocks for you to build your own functionality. That's what browsers should provide -- low level building blocks.