Why isn't this simple alphanumeric regex matching with JS but it is matching on regex101?

Question

I'm trying to test the string UNCLTEST614NESZZ.

Using the regex /^[a-z0-9]+$/i.

Below is the code being used.

let regex = new RegExp("/^[a-z0-9]+$/i");
let match = regex.test(serial);

Yet match ends up being false, despite the same regex and test string in regex101 producing a positive result

You don't use `/` when using `new RegExp(string literal)`; plus the flags must be specified in second parameter. — Salman A, Oct 14 '21 at 12:45
I think it should be like `new RegExp(/^[a-z0-9]+$/, "i");` or `new RegExp("^[a-z0-9]+$", "i");` or `/^[a-z0-9]+$/i` — The fourth bird, Oct 14 '21 at 12:45

score 1 · Accepted Answer · answered Oct 14 '21 at 12:49

1

You can either use

let regex = new RegExp("^[a-z0-9]+$", "i");

or

let regex = /^[a-z0-9]+$/i;

answered Oct 14 '21 at 12:49

atlau

1 Answers1