Hacktoberfest - My 1st

This is the first contribution I have made for Hacktoberfest.

The issue can be found here.
It is a new feature I think should involved into a credit card generator - credit card number validation.

Here is the pull request I have made.
I added a method with the submit click button.

The author merged it in 10 minutes. However I found the algorithm need to be improved. I will let the author know later. I think the merge need to be more precise?

I learned how to contribute on open source using git command.


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