Reflection in JavaScript

There are no classes in JavaScript (although due to code style which for reasons unknown to me imitates Java you could think there are some). Foo.Bar.Test does not mean class Test registered in namespace Foo.Bar, but function which is assigned as attribute Test of some object which is assigned as attribute Bar of some object known as Foo.

You can't do reflection like "give me all variables to which number 7 is assigned", consequently you can't list all the objects which hold Test in one of their attributes.

This is actually good and opens new possibilities, but might be confusing in the beginning.

BTW Since there are no classes in JavaScript, I believe term reflection is not very fortunate. And new Foo() does not mean "create new instance of Foo", but "create a new object and execute function Foo in context of that object, and finally return it. Yeah, the new keyword is very confusing, if you want to do anything more advanced in JavaScript, never trust your Java/C# experience. JavaScript fakes Java (I suppose to not scare newcomers and allow them to do easy things quickly), but it's very different.

This is not possible in JavaScript. (To get a deeper understanding of JavaScript's type system, I recommend reading this.)

The best approximation you can do is querying over a static JSON structure.