VisualBasic, back in the day.

haven't found a universally good option yet; delphi was close 15 years ago, but the world forgot about it mostly. hoping for WASM+compiled language framework somewhat like this one to fit the bill so I don't have to worry about supporting multiple browsers, multiple browser versions, cross platform support, css...

WASM (language independence) on electron (fixed, controlled browser version) with delphi-like UI designer could work, maybe.

HyperCard.

PowerBuilder, in the EMR industry.

Beeware!