> When people say "js doesn't have a stdlib" they mean "js doesn't have a robust general purpose stdlib like C++ ...

It does though! The JS stdlib even includes an entire wasm runtime. Its huge!

Seriously. I can barely think of any features in the C++ stdlib that are missing from JS. There's a couple - like JS is missing std::priority_queue. But JS has soooo much stuff that C++ is missing. Its insane.