How to check with javascript if connection is local host?

Question

I want to have a check in my javascript if the page loading up is on my local machine.

The reason why I want to do that is that when I developing I like to make sure

Answer 1

const LOCAL_DOMAINS = [ "localhost", "127.0.0.1" ];

/* offline || development */
if ( LOCAL_DOMAINS.includes(location.hostname) )
{
    BASE_URL_PUBLIC = location.hostname + "/folder/website/"; // your project folder
}

/* online || production */
else
{
    BASE_URL_PUBLIC = location.hostname;
}