I need JavaScript that checks if a user's IP address is in a range of IPs

I need JavaScript that does the following: 1. Load a list of IP ranges from an external file (like a text, CSV, or similar file). This file should be easy to edit and contains the following information for each entry (there will be multiple entries): IP start of range IP end of range A note So for example if it’s a CSV, it would look like this: [login to view URL],[login to view URL],”Owner of this IP range” [login to view URL],[login to view URL],”Owner of a different IP range” 2. Get the user’s public IP address 3. A function to check if the user’s IP address is in any of the ranges in the external file 4. If the user’s IP is in any of the ranges in the external file, write a cookie called “authcookie” that contains the string “ipok” and the user’s IP address Notes: - This is for IPv4 addresses only, no IPv6 needed - It’s ok to use js libraries/existing code like these to check if the user’s IP is in a range, whatever gives the best performance: [login to view URL] [login to view URL] - I am open to converting the range of IPs into CIDR and checking if the user’s IP is in CIDR blocks Method of delivery: I would like this packaged as: - .js file containing the code and function(s) - .js files for any required library/libraries - External file with ranges of IPs - HTML file that calls the JS, displays the user’s IP address, and outputs whether the current IP address is in the range of IPs in the external file