How can I see a Javascript object's prototype chain?

Question

Given the following code:

function a() {}
function b() {}
b.prototype = new a();
var b1 = new b();

We can stay that a has been add

Answer 1

edit — This answer is from 2010, and quite obsolete. Since then the language has added the Object.getPrototypeOf() API, which vastly simplifies the process.

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You could use the "constructor" property of the object to find the prototype there, and then chain along that until you reached the end of the rainbow.

function getPrototypes(o) {
  return (function gp(o, protos) {
    var c = o.constructor;
    if (c.prototype) {
      protos.push(c.prototype);
      return gp(c.prototype, protos);
    }
    return protos;
  })(o, []);
}

(maybe) (or maybe not :-) give me a sec) (well crap; I think it's possible but ignore that code)

[edit] wow this is totally blowing my mind - that function's close but not quite right; setting up a chain of prototypes is weird and I'm feeling scared and lonely. I suggest paying attention only to the awesome @CMS above.