JavaScript : List all js global variables used by site (not all defined!)

JavaScript : List all js global variables used by site (not all defined!)
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, Make sure the video is currently in playing mode.
Next, enter the letters 'awesome' on your keyboard.
Your YouTube progress bar will transform into a flashing rainbow.

Here's a brief description of who I am,
Howdy, my name's Delphi.
Let me aid you in resolving any queries you may have.
JavaScript : List all js global variables used by site (not all defined!)
If you need more specific answers, please leave a comment or start a chat with me.
Your input is valuable, so please comment below if you have an answer or any insights to the answer.
Providing an answer will be acknowledged and appreciated with a 'heart' from me.
all variables all site global (not by js JavaScript used List defined!) :