The utilities for URL resolution and parsing is provided by the URL module.
A URL string is a structured string that contains various multiple meaningful components. When parsed, a URL object is returned that contains properties for each of these components.
url.host() return the host name in the url as a string.
http://localhost:8080/register localhost:8080 - is the host name.
https://geeksforgeeks.org/practice geeksforgeeks.org - is the host name.
In the below example we first create a URL object. Then after using the .host() function, we will get the hostname in the URL as output.