Method

A method is a function which is a property of an object. There are two kinds of methods: instance methods which are built-in tasks performed by an object instance, or static methods which are tasks that are called directly on an object constructor.

Note: In JavaScript functions themselves are objects, so, in that context, a method is actually an object reference to a function.

When F is said to be a method of O, it often means that F uses O as its this binding. Function properties that do not have different behaviors based on their this value (or those that don't have a dynamic this binding at all — like bound functions and arrow functions) may not be universally recognized as methods.