Does JavaScript support some kind of __Resolve method?

[Arodicus]

I have a dynamic class. I would like to be able to attempt to access properties and methods on that class, and if they do not exist, I want the Class to handle the problem in a specific way, rather than throw an exception.

Thsi needs to be done internally to the class, not with an external "try" clause. In some languages this is known as a __resolve function.

thus

var foo = new MyClass()
 
function MyClass(){
    this.dog = "woof"
    function __resolve(e) {
        alert("I don't know what a" + e + "is");
    }
}
 
alert(foo.dog) // woof
foo.cat() // I don't know what a cat is

Is this possible?

[gits]

hmmm ... at the moment for a quick shot i would use something like the following for that:

function OBJ() {
    this.foo = function(s) {
        alert(s);
    };
}
 
OBJ.prototype.f = function(func, params) {
    if (typeof this[func] != 'undefined') {
        this[func].apply(this, params);
    } else {
        alert('i don\'t know what ' + func + ' is.'); 
    }
}
 
var o = new OBJ;
 
o.f('foo', ['test']);
 

that example calls foo like expected and when you try to call:

o.f('cat', []);

you get it '__resolved' ...

may be that helps?

kind regards

PS: may be that has to be adapted for different things, when trying to call a method (like the example works at the moment) or a simple property or whatever ;)