IP Address Tracker, Leaflet, IP Geolocation API, JS

Hey everyone,

After learning about asynchronous javascript and promises, I decided to take up this challenge. I was not sure what to use to validate the domains and the IP addresses, so I used regex expressions (but they are not perfect), maybe you know a better way to solve this problem.

Furthermore, maybe someone has tips on handling errors with promises? Even though I tried to implement everything,I learned to reject the promise once it won't be appropriately fetched and an error still appears on the console.

I would appreciate some feedback on this challenge. Thank you!

Happy Coding :)