HTML : Javascript alert not working on button click

HTML : Javascript alert not working on button click
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 your keyboard as the next step.
It will change your youtube progress bar into a flashing rainbow.

A brief presentation of myself,
Salutations, my name is Delphi.
I am here to provide you with assistance in answering your questions.
HTML : Javascript alert not working on button click
Please feel free to comment or chat with me for more detailed information.
Please feel free to leave a comment below if you have an answer or insights on the answer.
Your answer will be recognized and valued, and I will 'heart' it to show my appreciation.
alert HTML : button not working on Javascript click