Book Image

Web Developer's Reference Guide

By : Joshua Johanan, Talha Khan, Ricardo Zea
Book Image

Web Developer's Reference Guide

By: Joshua Johanan, Talha Khan, Ricardo Zea

Overview of this book

This comprehensive reference guide takes you through each topic in web development and highlights the most popular and important elements of each area. Starting with HTML, you will learn key elements and attributes and how they relate to each other. Next, you will explore CSS pseudo-classes and pseudo-elements, followed by CSS properties and functions. This will introduce you to many powerful and new selectors. You will then move on to JavaScript. This section will not just introduce functions, but will provide you with an entire reference for the language and paradigms. You will discover more about three of the most popular frameworks today—Bootstrap, which builds on CSS, jQuery which builds on JavaScript, and AngularJS, which also builds on JavaScript. Finally, you will take a walk-through Node.js, which is a server-side framework that allows you to write programs in JavaScript.
Table of Contents (22 chapters)
Web Developer's Reference Guide
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Preface
9
JavaScript Expressions, Operators, Statements, and Arrays
Index

Classes and modules


In JavaScript, we do not have any native approach to creating classes, but we can create a class using prototype inheritance and a constructor function.

Classes are containers for objects. We use classes to encapsulate a namespace and logic.

To instantiate a class, we can use the new keyword. Classes are similar to constructor functions. Here is an example:

function student(nameI) {
  This.name=name;
  this.age='18';
}
student.prototype.std=function() {
  //define some code
};
module.export=student;

Note

Modules are used to include and extend classes and properties easily. Modules attach properties to global objects to export module values.

Classes and their modules are extremely important and vital aspects of JavaScript. We will be covering the following topics in the subsequent sections:

  • Classes and prototypes

  • Constructors

  • Java-style classes in JavaScript

  • Augmented JavaScript

  • Types of classes

  • Subclasses

  • Classes in ECMA5 script

  • Modules

Classes and prototypes

In JavaScript, a class is...