JavaScript : What is the difference between String.slice and String.substring?

To Access My Live Chat Page,
On Google, Search for "hows tech developer connect"

I promised to reveal a secret feature to you, and now it's time to share it.
This is a YouTube's feature which works on Desktop.
First, Make sure the video is currently in playing mode.
After that, type the word 'awesome' on your keyboard.
The progress bar on YouTube will be altered to a flashing rainbow.

Allow me to introduce myself briefly,
Hello everyone, I'm Delphi.
I am here to assist you in getting the answers you need.
Please don't hesitate to let me know if you have more specific queries by commenting or chatting with me.
Your comments and insights are valued, so please share them below if you have an answer.
A 'heart' from me will be given to show my gratitude for your contribution.