Knockout JS Model Inheritance

Question

I have three relatively similar knockout models in my application and I would like to extend a base model to combine common properties rather than repeat myself three times.

Answer 1

I've done something similar, with a lot of trial and error, but I got this to work for me:

var StandardItemModel = function (item, cartItemTypes) {
    var self = this;
    ItemModel.call(self, item)
}

You then need to add a prototyped constructor:

StandardModel.prototype = new ItemModel();

If you want to have common methods, then you need to add them to the base classes using prototype to add them, then call them in the higher class using:

ItemModel.prototype.methodName.call(self, parameters);