Question

I have want to check if an object extends another object (true, false):

Example:

var BaseObject = function(object) {
    this.name = object.name;
    this.someFunction = object.someFunction;
    this.someOtherProperty = object.someOtherProperty;
};

var ExtendingObject = new BaseObject({
    name: "extention",
    someFunction: function(value) { return value; },
    someOtherProperty = "hi"
});

// some possible function
var extends = isExtending(BaseObject, ExtendingObject);
var isParentof = isParentOf(BaseObject, ExtendingObject);

Does underscore.js provide such a function (well I found none…)?

How can I perform such a check?

Answer 1

Try using the instanceof operator.