I use PHP 7.2 and MySql 5.6,
The link is here.
This is a credit card form. It's a very useful form. However, I'm new to JS and I know that data can be manuplated with JS.
It can be posted without my knowledge with JS of JQuery and credit card information is a very sensitive data as you can imagine.
I check the JS file, I didn't see any part that POST data or another 3rd party links. How can I be sure that the form is safe and do not send or post any of my users data?