But but hundreds of top websites and now even unity uses js, definitely not scri...

pjmlp · on July 19, 2018

Because JS has been the only browser native language.

As for Unity, I am not so sure about it.

https://blogs.unity3d.com/2017/08/11/unityscripts-long-ride-...

regul8 · on July 19, 2018

This is all by unfortunate necessity, certainly not by choice. The very raison d’etre of languages like TypeScript that transpile to JavaScript is because of the flaws of this hack language that simply found itself in the right place at the right time in history

idiocyreigns · on July 19, 2018

And it's all only temporary in light of WebAssembly.