this value in JavaScript anonymous function

Question

Can anybody explain to me why A is true and B is false? I would have expected B to be true as well.

function MyObject() {

};

MyOb         


        

Answer 1

this is set based on how you call the function.
Your anonymous function is a normal function call, so this is the global object.

You could write (function() { ... }).call(this) to explicitly call it with your this.