HTML : Change ID's of child elements in JavaScript when cloning an element

HTML : Change ID's of child elements in JavaScript when cloning an element
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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, Ensure that the video is playing before proceeding.
Then, type the letters 'awesome' on the keyboard.
It will change your youtube progress bar into a flashing rainbow.

Let me give you a quick introduction about myself,
Salutations, my name is Delphi.
Allow me to support you in answering your questions.
HTML : Change ID's of child elements in JavaScript when cloning an element
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: ID's JavaScript in HTML Change when of child cloning element elements an