How to remove the last comma in javascript

Question

let str = "Testing, how to, remove, comma"

How can I remove that last comma (,) between "remove" and "comma" using JavaScript? Preference using replace with regex

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– Andy, Commented Sep 12, 2021 at 7:20

Chris · Accepted Answer · 2021-09-12 07:44:38Z

1

There are probably better ways than using regular expressions, but you can do this:

str.replace(/,([^,]+$)/, "$1")

const str = "Testing, how to, remove, comma"

console.log(str.replace(/,([^,]+$)/, "$1"));

The regular expression matches a comma, then in a group it matches everything that is not a comma until the end of the string. The replacement is "$1", which is the first capturing group, meaning everything after the last comma.

answered Sep 12, 2021 at 7:44

Chris

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