Objects - JavaScript: Novice to Ninja - page 135

Chapter

5

Objects

Everything in JavaScript is either one of the five primitive values we met in Chapter 2
(strings, numbers, Booleans, undefined, and null) or an object . We've actually met some
objects already; arrays in Chapter 3 and functions in Chapter 4 are both objects, although
these are built-in objects that are part of the language. In this chapter we're going to look at
user-defined objects as well as some other built-in objects.

In this chapter, we'll be covering the following topics:

• object literals

• adding properties to objects

• object methods

• JSON

• the Math object

• the Date object

• the RegExp object

• our project―create quiz and question objects and ask random questions