Modern JavaScript for the Impatient

Chapter 11. Metaprogramming

Topics in This Chapter

11.1      Symbols

11.2      Customization with Symbol Properties

11.3      Property Attributes

11.4      Enumerating Properties

11.5      Testing a Single Property

11.6      Protecting Objects

11.7      Creating or Updating Objects

11.8      Accessing and Updating the Prototype

11.9      Cloning Objects

11.10      Function Properties

11.11      Binding Arguments and Invoking Methods

11.12      Proxies

11.13      The Reflect Class

11.14      Proxy Invariants

Exercises

This chapter is a deep dive into advanced APIs that you can use to create objects that have nonstandard behavior, and to write code that works with generic objects.

We start by looking at symbols, the only type other than strings ...