Replace params in javascript

Question

I tried a lot to replace the query parameter using Javascript. But its not working. Can you please share any solutions to replace the parameter.

Below is the example:

console.log("www.test.com?x=a".replace(new RegExp(`${"x=a"}&?`),''));

The output I get is www.test.com ?. Is there any way to replace ? and to get only www.test.com?

why are you using a template parameter that's just a hardcoded string? — user120242
– user120242, Commented Jun 20, 2020 at 18:14
You want to remove whaever comes from the question mark including it? — Benjamín Escobar
– Benjamín Escobar, Commented Jun 20, 2020 at 18:16
Why do you need a regex for "?x=a". You could just split. Or just hard code in replace — Ashik Paul
– Ashik Paul, Commented Jun 20, 2020 at 18:16
Use the URL constructor. new URL(url).hostname should work — adiga
– adiga, Commented Jun 20, 2020 at 18:29

Benjamín Escobar · Accepted Answer · 2020-06-20 18:18:18Z

1

If you want to remove whatever comes from the question mark including it, try this instead:

console.log("www.test.com?x=a".split("?")[0]);

That way you get only what's before the question mark.

I hope that helps you out.

answered Jun 20, 2020 at 18:18

Benjamín Escobar

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CFLS · Accepted Answer · 2020-06-20 18:21:32Z

1

You can remove all query strings using the following regex:

\?(.*)

const url = "www.test.com?x=1&b=2"
console.log(url.replace(/\?(.*)/, ''));

answered Jun 20, 2020 at 18:21

CFLS

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2 Comments

Ramya Over a year ago

Sorry I new to JS, I want to remove only first parameter and not all. i dont want to remove all query strings. I want to remove only "x=1" and the output should be like www.test.com?b=2

adiga Over a year ago

@Ramya this is why you need to create a minimal reproducible example with inputs that cover all scenarios, the expected behavior and a clear problem statement. From the question, it isn't clear whether you want to get the hostname, remove the query string or only a part of the query string.

Alessio Cantarella · Accepted Answer · 2020-06-20 18:17:19Z

0

You could brutally replace the '?x=a' string with the JavaScript replace function or, even better, you could split the string in two (based on the index of ?) with the JavaScript split function and take the first part, e.g.:

let str = 'www.test.com?x=a';
console.log(str.replace('?x=a', ''));
console.log(str.split('?')[0]);

answered Jun 20, 2020 at 18:17

Alessio Cantarella

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