what this regular expression mean '/\/?(?:\?.*)?$/'

Question

I could not understand the following code:

var req = "google.com/?x=value&y=another";
req = req.replace(/\/?(?:\?.*)?$/, '');
console.log(req);

The above code prints google.com, its removing the query parameters from the string.

can anyone explain me how the replace function doing this task?

See yourself, [here](https://regex101.com/r/iT9rU7/1) see in the `EXPLANATION` section on the right top corner — Tushar, Jul 24 '15 at 11:53
Just have a look at the explanation of regex101.com: https://regex101.com/r/jX2vD8/1 — dognose, Jul 24 '15 at 11:54
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions — 1983, Jul 24 '15 at 11:57

score 0 · Answer 1 · answered Jul 24 '15 at 11:56

0

/? matches the character / literally

(?:\?.*)? Non-capturing group

\? matches the character ? literally

.* matches any character (except newline)

$ assert position at end of the string

answered Jul 24 '15 at 11:56

andrescpacheco

1 Answers1