NodeJS : Uncaught ReferenceError: io is not defined

NodeJS : Uncaught ReferenceError: io is not defined
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, Ensure that the video is playing before proceeding.
Then, type the letters 'awesome' on the keyboard.
It will change your youtube progress bar into a flashing rainbow.

A quick introduction about me,
Hi there, I go by the name of Delphi.
I help you answer your questions.
NodeJS : Uncaught ReferenceError: io is not defined
I am available to answer your more detailed queries via comments or chat.
If you have additional information or an answer to share, please comment below.
Your answer will be acknowledged and appreciated, and I will 'heart' it as a sign of gratitude.
not ReferenceError: is Uncaught NodeJS defined : io