Extending the defaults of a Model superclass in Backbone.js

extending-the-defaults-of-a-model-superclass-in-backbone-js

var ExtendedInventory = Inventory.extend({
    defaults: {
        rabit:25
    }
});

_.extend(ExtendedInventory.prototype.defaults, Inventory.prototype.defaults);

// or

var ExtendedInventory = Inventory.extend({
    defaults: _.extend({},Inventory.prototype.defaults,
         {rabit:25}
    )
});