Get req params in client Javascript

Say I have a string like

http://somerandomwebsite.com/345345/465645456546

This string matches the pattern

http://somerandomwebsite.com/:userId/:gameId

From the above string, how do I extract the userId and gameId values no matter their length(so not substring)

I know in ExpressJS you can do

app.get("/:userId/:gameId", (req, res) => {
var userId = req.params.userId
var gameId = req.params.gameId
})

But I need this to work in client side Javascript

Is there any way to do this?

Answer

The URL API is a safe and modern method that works server and client side:

location.pathname can be used if it is the url of the page you are on

link.pathname can be used for link objects

Say I have a string – then you need to make it a URL first

const [_,userID, gameID] = new URL("http://somerandomwebsite.com/345345/465645456546")
  .pathname.split("/"); 
console.log(userID,gameID);