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Object-Oriented JavaScript

Object-Oriented JavaScript

By : Antani, Stoyan Stefanov
4.5 (6)
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Object-Oriented JavaScript

Object-Oriented JavaScript

4.5 (6)
By: Antani, Stoyan Stefanov

Overview of this book

JavaScript is an object-oriented programming language that is used for website development. Web pages developed today currently follow a paradigm that has three clearly distinguishable parts: content (HTML), presentation (CSS), and behavior (JavaScript). JavaScript is one important pillar in this paradigm, and is responsible for the running of the web pages. This book will take your JavaScript skills to a new level of sophistication and get you prepared for your journey through professional web development. Updated for ES6, this book covers everything you will need to unleash the power of object-oriented programming in JavaScript while building professional web applications. The book begins with the basics of object-oriented programming in JavaScript and then gradually progresses to cover functions, objects, and prototypes, and how these concepts can be used to make your programs cleaner, more maintainable, faster, and compatible with other programs/libraries. By the end of the book, you will have learned how to incorporate object-oriented programming in your web development workflow to build professional JavaScript applications.
Table of Contents (19 chapters)
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15
B. Built-in Functions
17
D. Regular Expressions

Function

JavaScript functions are objects. They can be defined using the Function constructor, like so:

    var sum = new Function('a', 'b', 'return a + b;'); 

This is a (generally not recommended) alternative to the function literal (also known as function expression):

    var sum = function (a, b) { 
      return a + b; 
    }; 

Or, the more common function definition:

    function sum(a, b) { 
      return a + b; 
    } 

The Function.prototype members

Following are the list of members of the Function constructor:

Property/Method

Description

apply(this_obj, params_array)

Allows you to call another function while overwriting the other function's this value. The first parameter that apply() accepts is the object to be bound to this inside the function and the second is an array of arguments to be sent to the function being called:

    function whatIsIt(){   
      return this.toString();   
    }   
    > var myObj = {};   
    > whatIsIt...
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