Localhost 3000: In the world of web

In the world of web development, localhost:3000 is a popular shorthand for localhost port 3000 , the default port used by many web servers. It is often used to When developers run a local server, it typically listens to requests made to IP address 127.0.0.1, which maps to localhost —your computer. The number 3000 designates the port on which that server accepts connections. Developers use localhost : 3000 to see the preview of the developed application and test it according to the requirements for responsiveness and other parameters before deploying it to production. Given that the port is bind to any IP address other than 127.0.0.1 ( localhost ), you can access it from any other system. To view your IP addresses, use ipconfig (Windows) or ifconfig (Linux) command. Find out the IP which is in the same network as the "other system" from which you want access. Then access it like, for example: 172.16.0.12: 3000 . PS: Remember to include the port 3000 even when accessing it through another system. Also, hostnames may be used in place of IP addresses, if configured.