NodeJS : Reduce nested array to formatted string

NodeJS : Reduce nested array to formatted string
To Access My Live Chat Page,
On Google, Search for "hows tech developer connect"

As promised, I have a secret feature that I want to reveal to you.
This is a YouTube's feature which works on Desktop.
First, Make sure the video is currently in playing mode.
Next, enter the letters 'awesome' on your keyboard.
It will change your youtube progress bar into a flashing rainbow.

Allow me to introduce myself briefly,
Greetings, my name is Delphi.
Let me aid you in resolving any queries you may have.
NodeJS : Reduce nested array to formatted string
If you need more specific information, let me know by leaving a comment or starting a chat.
Your thoughts and contributions are welcome, so please leave a comment below if you have an answer or insights to the answer.
Your answer will be recognized and valued, and I will 'heart' it to show my appreciation.
Reduce nested : string formatted to array NodeJS