Rediscovering JavaScript

Purpose of Reflect

We’ve used a few methods of Reflect so far in this book. It’s time to step back and take a fresh look at this class. Reflect has two main purposes:

• It’s a go-to place for various meta-operations on objects. For example, Reflect provides methods to get and set the prototype of an object and to check whether a property exists in an object, just to mention a couple.

• The Proxy class, which we’ll see soon, by default routes its methods to methods of Reflect. Then when using a proxy we can override only select operations and conveniently leave the rest to the default implementations.

There are about two dozen methods in Reflect; let’s sample a few interesting and often used methods of this class.

Invoking a Function Through Reflect ...