I want to replace a part of url:

Origin-> https://example.u-test.com/ex-2<br>


Destination-> https://example.u-test.com/ex <br>

So what I want is to remove part after "-" but only in the second part after first slash.

With url.replace(/ *\-[^.]*\. */g, ".") I get:

https://example.u.com/ex-2

I want to remove "-2" after ex, not "-test" in the first part.

What is the right regex expression?

CodePudding user response：

You can use the URL interface for that. it allows you to easily read and modify the different components of a given URL.

const url =  new URL("https://example.u-test.com/ex-2");

const domain = url.hostname;
const pathname = url.pathname;
const part = pathname.split("-")[0];

console.log(domain   part);

CodePudding user response：

In case you absolutely want to do this with regular expressions:

const url = "https://example.u-test.com/ex-2"
const result = url.replace(/-[^-]*$/g, "")
console.log(result)

Explanation: If you want to remove the part after the last slash or dash, you should begin your match on that point. The above regular expression starts matching at the last dash (-) character in the line. Regex will match only the last dash because the subsequent characters it searches for is everything except another dash, followed by the end of the line ($).

• - matches a dash (-) character
• [^-]* matches everything except for another dash
• $ after the dash and the non-dash characters, there must be the end of the line