HTML : Add event to button with javascript

HTML : Add event to button with javascript
To Access My Live Chat Page,
On Google, Search for "hows tech developer connect"

As I promised, I have a secret feature to share with you.
This is a YouTube's feature which works on Desktop.
First, Ensure that the video is playing before proceeding.
After that, type the word 'awesome' on your keyboard.
It will change your youtube progress bar into a flashing rainbow.

Let me give you a quick introduction about myself,
Greetings, my name is Delphi.
Allow me to support you in answering your questions.
HTML : Add event to button with javascript
If you have specific questions that need answers, please don't hesitate to comment or chat with me.
If you have knowledge to contribute or an answer to provide, we encourage you to comment below.
Providing an answer will be acknowledged and appreciated with a 'heart' from me.
button with Add HTML : javascript to event