JS: Function Call, Apply, Bind

In JavaScript, any function, when called, has a associated value called “this binding”.

In function definition, the value of “this binding” is represented by the keyword this.

〔►see JS: “this” Binding〕

When a function f is called in the form x.f(…), the value of “this binding” is the object x.

You can use methods {call, apply, bind} to pass any object to be “this binding”.

The methods {call, apply, bind} are properties of the object Function.prototype. ALL JavaScript functions are decedents of Function.prototype. 〔►see JS: Prototype and Inheritance〕

Function.prototype.call

〔►see JS: Function.prototype.call〕

Function.prototype.apply

The function “apply” is the similar to “call”, but the second argument is a array. The elements of the array is passed to the function as separate arguments.

〔►see JS: Function.prototype.apply〕

Function.prototype.bind

〔►see JS: Function.prototype.bind〕