Functions Are Objects of the "Function" Type

This section provides an overview of a unique feature of JavaScript language: functions are objects of the 'Function' type.

One very interesting feature the JavaScript language is that a function is an object of the Function object type. Treating functions as objects can lead to several programming implications:

A function can be created in 3 different ways:

Table of Contents

 About This Book

 Introduction to JavaScript

 ECMAScript Language Specification and JavaScript Dialects

 Data Types, Variables and Expressions

 Flow Control Statements

 Creating, Accessing, and Manipulating Arrays

 Defining and Calling Functions

 Web Browser Supporting JavaScript

 Server-Side and Client-Side Web Scripting

 Introduction to Objects

 Defining Your Own Object Types

 Inheritance of Properties and Methods through the Prototype Object Chain

 'jrunscript' - JavaScript Shell Command from JDK

Using Functions as "Function" Objects

Functions Are Objects of the "Function" Type

 Using the Function Constructor

 Function Object Inherited Properties and Methods

 Function Object Instance Properties

 Creating Function Objects with "function" Statements

 Creating Function Objects with the "function" Operator

 Comparing 3 Ways of Creating Functions

 Introduction to Built-in Object Types

 W3C's Document Object Model (DOM) Specifications


 PDF Printing Version