Localization using Nodejs

Question

I’m starting with Node and I’m creating an application where I wanted to take the current location of the user and with this location I can make comparisons and if possible even save in the Bank.

I think it will work that way:

1. The user will create a group
2. When group is created add into the database along with group details such as name, image, etc the location where this group was created.

I want to save in the bank the location where the group was created because I intend to use it as a comparison if the user is looking for new groups to be part of, show the groups that were created next to it.

I wonder if it is possible to do this and if so, how could I make a comparison to list the groups that are in an "x" KM radius