2.1.12 [ECMA-262/5] Section 15.4.4.4, Array.prototype.concat ([item1 [ , item2 [ , … ]]])

V0013:

The specification states:

 NOTE The concat 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 concat function can be applied successfully to a host object is implementation-dependent.

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

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

Show: