HTML : DOM manipulation without JavaScript

HTML : DOM manipulation without JavaScript
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.
Then, type the letters 'awesome' on your keyboard as the next step.
It will change your youtube progress bar into a flashing rainbow.

An introduction to myself in a few words,
Greetings, my name is Delphi.
I am at your disposal to help you with any questions you have.
HTML : DOM manipulation without JavaScript
If you require more detailed information, please don't hesitate to comment or chat with me.
Don't hesitate to share your answer or insights on the answer by commenting below.
Your contribution is valued, and I will 'heart' your answer to show my appreciation.
manipulation : DOM JavaScript HTML without