What regular expression can be used to cut such a string?

Question

JavaScript

Good afternoon. There is a line:
"http://localhost:8080/somepath/somepath/somepath"
You need to get the part up to the third slash inclusive:
"http://localhost:8080/"
The line can change, i.e. url may change. for example:
"http://mysite.ru/"
And the regular expression should be able to process it too, so I decided that it would be advisable to get the part of the url before the third slash, because this option will work for any url.
JS code. I think it would be best to handle this matter through replace (), but I'm not strong in regular expressions. How to solve the problem correctly?

Answer 1

There is also a wonderful built-in parser.

let link = document.createElement('a');
link.href = "https://localhost8080/somepath/somepath/somepath?param=42#some-hash";

link.protocol // -> https:
link.host     // -> localhost8080
link.pathname // -> /somepath/somepath/somepath
link.hash     // -> #some-hash
link.search   // -> ?param=42

List of all properties here: https://developer.mozilla.org/ru/docs/Web/API/Location

Answer 2

url .