NodeJS : How does function declaration by square brackets work in Node.js / Javascript?

To Access My Live Chat Page,
On Google, Search for "hows tech developer connect"

As promised, I have a hidden feature that I want to share with you.
This is a YouTube's feature which works on Desktop.
First, Ensure that the video is playing before proceeding.
After that, type the word 'awesome' on your keyboard.
Your YouTube progress bar will transform into a flashing rainbow.

A brief introduction of myself,
Welcome, I'm Delphi.
Allow me to provide support in answering your questions.
Let me know if you have more specific questions or concerns by leaving a comment or starting a chat.
If you have an answer or any relevant information to share, please comment below.
Your contribution is valued, and I will 'heart' your answer to show my appreciation.