Javascript type of custom object.

Question

How can I check if my javascript object is of a certain type.

var SomeObject = function() { }
var s1 = new SomeObject();

In the case above typeof s1 will return "object". That's not very helpful. Is there some way to check if s1 is of type SomeObject ?

Answer 1

Yes, using instanceof:

if (s1 instanceof SomeObject) { ... }

Answer 2

You could also take a look at the way that they do it in php.js:

http://phpjs.org/functions/get%5Fclass:409