[WorldMaker]

Also, even namespaces and enums aren't that foreign, and are still "JS compatible" in that they transpile to perfectly normal JS code that you can still use quite obviously in other JS code (enums create a list of constants and sometimes a reverse lookup map; namespaces create ugly, nested, mergeable object literals and IIFEs just like Grandma jQuery used to bake back in the bad old days before module systems). From one point of view they are nothing but syntactic sugar for common JS patterns.