Page 157 - DCAP202_Fundamentals of Web Programming

Fundamentals of Web Programming Deepak Mehta, Lovely Professional University

Notes Unit 13: Building Object of JavaScript

CONTENTS
Objectives

Introduction
13.1 Using JavaScript as a Scientific Calculator
13.1.1 JavaScript Objects for a Date
13.1.2 Creating Arrays and Objects

13.2 String Object
13.2.1 Chaining Methods
13.3 The Math Object
13.4 Date Object

13.4.1 Using Date Methods
13.5 User Defined Objects
13.5.1 The New Operator
13.5.2 The Object () Constructor

13.6 Summary
13.7 Keywords
13.8 Review Questions
13.9 Further Readings

Objectives

After studying this unit, you will be able to:

 Using JavaScript as a scientific calculator
 Explain Math Object
 Explain String Object
 Explain Date Object
 User Defined Object

Introduction

Objects in JavaScript, just as many other programming languages, can be compared to objects in
real life. The concept of objects in JavaScript can be understood with real life, tangible objects.
In JavaScript, an object is a standalone entity, with properties and type.

Example: Compare it with a cup. A cup is an object, with properties. A cup has a colour,
a design, weight, a material it is made of, etc. The same way, JavaScript objects can have properties,
which define their characteristics.

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