Wrapping functions – keeping behavior

In this section, we’ll consider some HOFs that provide a wrapper around other functions to enhance them in some way but without altering their original objective. In terms of design patterns (which we’ll be revisiting in Chapter 11, Implementing Design Patterns), we can also speak of decorators. This pattern is based on the concept of adding some behavior to an object (in our case, a function) without affecting other objects. The term decorator is also popular because of its usage in frameworks, such as Angular, or (in an experimental mode) for general programming in JavaScript.

Waiting for decorators

Decorators are being considered for general adoption in JavaScript. Currently (as of December 2022), they are at Stage 3, Candidate level, so it may still be a while until they get to Stage 4 (Finished, meaning “officially adopted”). You can read more about the proposal for decorators at tc39.github.io/proposal...