TypeScript instanceof not working

Question

I\'m having issues using the instanceof operator and it doesn\'t seem to work. Here is a part of my code:

        const results = _.map(items, function(item:         


        

Answer 1

Try to instantiate the object with a constructor. It happened to me the same because I was manually mocking the object for testing purposes. If you create the item like following example, it should work:

item: Goal = new Goal(*item values*)