Explore the basics of JavaScript in greater detail to solve real-world problems.

Zero to Hero in JavaScript

This module aims to teach us how to write cleaner, more modular, and more scalable code in JavaScript by giving us an understanding of object-oriented programming (OOP). We'll start with the basics of object-oriented programming and build up to more advanced concepts such as data protection and inheritance. Along the way, we'll learn how each concept applies to JavaScript in particular, as well as how various JavaScript features make it a suitable language for object-oriented programming.

JavaScript: A Deep Dive

# Background

There are occasions when you need functions inside functions. This may sound like a nested function problem, but sometimes one function is dependent on another function’s input to trigger a particular output. For this, we *pass* **functions** as **arguments**.

# Introduction

Functions can be *passed* into other functions by being *passed* as arguments. This is because functions in JavaScript are objects. The functions that take other functions as an argument or *return* functions are called **higher-order functions**. Meanwhile, functions *passed* as arguments are called **callback functions**. Let’s look at some examples.

## Passing a regular function as an argument

In the following example, we pass a regular function as an argument.

Overlook on functions being passed as arguments to other functions.

Function as an Argument

Background

Introduction