Design

Goal

The goal of this exercise is to teach the student how callbacks are implemented in JavaScript.

In other words: how function can be passed as an argument to another function, then have them be called in order to control the flow of logic.

Learning objectives

Function that can pass along a callback function as an argument
How to write a function that can be used as a callback
How to compose functions with callbacks

Out of scope

Promises
Asynchronicity

Concepts

callbacks

Prerequisites

functions because they are the base for understanding arrow functions
objects because they are needed for the exercise