How to make a mobile phone input form with automatic detection of the user's country of residence and the corresponding input mask?

Question

JavaScript

Here is an example: https://stripe.com/checkout Click on Donate to Watsi and check remember me on the form. There will be a mask of the phone number of your country.

Answer 1

In google, the first result is 2coders.ru/opredelenie-strany-po-ip-na-php