2.1.26 [ECMA-262/5] Section, Array.prototype.forEach ( callbackfn [ , thisArg ] )


The specification states:

 NOTE The forEach function is intentionally generic; it does not require that its this value be an Array object. Therefore it can be transferred to other kinds of objects for use as a method. Whether the forEach function can be applied successfully to a host object is implementation-dependent.

IE9 Mode, IE10 Mode, IE11 Mode, and EdgeHTML Mode (All Versions)

The forEach method can be applied to a host object; however, some host objects may reject such an application.