Sounds like cope. Great Type System, Language Server, IDE Integration, compiler feedback, tooling ecosystem, DX Hot Reload - all things that made it the most used programming language on GitHub.
Overcomplicated type system. Language server seems redundant to mention, everything has a language server. Everything has ide integration. Everything has decent compiler feedback. Everything has hot reloading.
Typescript is a band aid on the gaping gushing wound that is JavaScript. It attempts to fix one problem JS has and it doesn't really succeed.