Chapter 4. Object-Oriented JavaScript

JavaScript's most fundamental data type is the Object data type. JavaScript objects can be seen as mutable key-value-based collections. In JavaScript, arrays, functions, and RegExp are objects while numbers, strings, and Booleans are object-like constructs that are immutable but have methods. In this chapter, you will learn the following topics:

  • Understanding objects
  • Instance properties versus prototype properties
  • Inheritance
  • Getters and setters

Understanding objects

Before we start looking at how JavaScript treats objects, we should spend some time on an object-oriented paradigm. Like most programming paradigms, object-oriented programming (OOP) also emerged from the need to manage complexity. The main idea is ...

Get Mastering JavaScript now with the O’Reilly learning platform.

O’Reilly members experience live online training, plus books, videos, and digital content from nearly 200 publishers.