Question

I’m trying to understand javascript scopes, and I want to know if in the following example:

// B can access 'context'
var a = function (context) {
    b = function () {
        console.log(context);
    };

    b();
};

a('nicccce'); // works!

// C can't access 'context'
var d = function () {
    console.log(context);
};

var c = function (context) {
    d();
};

c('oh oh'); // breaks

is there a way of accessing ‘context’ from the ‘d’ function?

EDIT:

I know I could pass the argument to the d function and thats obviously the sane thing to do, but I wanted to know if there was another way of doing it, maybe using this.callee as this.callee.arguments[0].

Answer 1

You can either

1) pass context into d as you do for c and a. or
2) put context int the lexical scope of d.

Option 2 sounds complicated, but it isn’t. That is exactly what you are doing in the case of b. context is “closed-in” to the execution scope of b because the variable is available on the scope of the caller of b (because it is an argument to a).