Question

i have a problem with instanciate a class with the window object, i have a namespace call UTIL and i have this class:

var UTIL = { Classes : {}};

UTIL.Classes.ObservationVal = function(state, id, type, context, performer, addresee, query) {
    this.query = query;
    SPEECH.Classes.ActionVal.call(this,state, id, type, context, performer, addresee);
}

UTIL.Classes.ObservationVal.prototype = new SPEECH.Classes.ActionVal();
UTIL.Classes.ObservationVal.prototype.constructor = SPEECH.Classes.ObservationVal;

after, i have this code:

var name = "ObservationVal";
var clStr = "UTIL.Classes." + name;
var obj = new window[clStr]();

and this last line shows the error: “window[clStr] is not a constructor”

I don’t understand why fail the instanciate, when the class ObservationVal is defined out of namespace like this:

function ObservationVal(state, id, type, context, performer, addresee, query) {
//..
}

the instanciate with window works ok.
Thanks.

Answer 1

This is because foo["bar.baz"] is not equal to foo.bar.baz. You probably need something like window.UTIL.Classes[name] here.