What is the “apply()” function in SAPUI5

Question

I know this is a silly question but I have seen in a lot of places the below statement:

something.apply(this, arguments)

Can someone please exp

Answer 1

Many components are subclasses of other UI5 components. In SAPUI5, the apply method is usually used to call methods in the parent of a subclass. This is often done from methods that override their parents original methods, to make sure that e.g. variables in the parent class are still properly initialised.

Answer 2

apply() is method of javascript Function.

See the documentation of apply(). This a very good explanation.