[d76d6776yudsy]

OP lost me quickly when ranting `in Javascript an object IS NOT an instance of a class.` while pointing at some TypeScript.

Also, plain javascript has had proper classes since the ECMAScript 2015 standard.

[Parsyval]

'proper classes' no 'class' keyword syntaxical sugar, behind it's all prototypal. Please understand that if you are doing JS.