javascript - Iterate Constructor Chain Up -

assuming have this:

function a() {}  function b() {} b.prototype = object.create(a.prototype);  function c() {} c.prototype = object.create(b.prototype);  var inst = new c(); 

i can inst instanceof c == true, inst instanceof b == true, instanceof c == true.

but how "iterate" constructor functions starting instance of c() it'd return function c(), function b(), function a() use instantiate instance.

you can iterate prototypes doing

for (var o=inst; o!=null; o=object.getprototypeof(o))     console.log(o); // {} // c.prototype // b.prototype // a.prototype // object.prototype 

however, iterate prototype chain. there no such thing "constructor chain". if want access constructors, need set .constructor property on prototypes appropriately when inheriting:

function a() {}  function b() {} b.prototype = object.create(a.prototype); b.prototype.constructor = b;  function c() {} c.prototype = object.create(b.prototype); c.prototype.constructor = c;  var inst = new c();  (var c=inst.constructor; c!=null; (c=object.getprototypeof(c.prototype)) && (c=c.constructor))     console.log(c); // c // b // // object 

---

which use instantiate instance

you need know of c that, not of "chain". may access via inst.constructor if have set c.prototype.constructor correctly.

however, might bad idea instantiate objects arbitrary constructors; don't know required parameters. don't know actually want do, request might hint @ design flaw.