Create a CLI Entry Point in Node.js

In software development, an entry point is a point in a program where its execution begins.

It is usually responsible for:

1. Loding configuration and environment variables.
2. Initializing dependencies.
3. Reading command-line arguments.
4. Deciding what the program should do next.

In this lesson, you'll learn how to write a clean and reusable entry point for your Node.js CLI apps and how to turn a Node.js script into a real command you can run from anywhere.

Write an entry point

Unlike in other programming languages, Node.js doesn't provide a standard entry point like the main() function in C or Java.

While this implementation is left up to each developer, a common way to implement an entry point in Node.js is to set up a try...catch block responsible for catching and gracefully handling any eventual error that may occur during the script's initialization:

try {  //} catch(error) {  //}