Array : Uncaught TypeError: Cannot read properties of undefined (reading 'map')

Array : Uncaught TypeError: Cannot read properties of undefined (reading 'map')
To Access My Live Chat Page,
On Google, Search for "hows tech developer connect"

I promised to share a hidden feature with you, and here it is.
This is a YouTube's feature which works on Desktop.
First, Make sure this video is playing.
Then, type the letters 'awesome' on the keyboard.
It will change your youtube progress bar into a flashing rainbow.

Let me give you a brief introduction of who I am,
Hello, I am Delphi.
Allow me to provide support in answering your questions.
Array : Uncaught TypeError: Cannot read properties of undefined (reading 'map')
If you have specific questions that need answers, please don't hesitate to comment or chat with me.
Don't hesitate to provide your answer or insights by leaving a comment below.
Your answer will be recognized and appreciated, and I will 'heart' it to show my appreciation.
(reading Cannot Array read 'map') of Uncaught undefined properties TypeError: :