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Editorial Team
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Asked: 2026-06-18T00:14:45+00:00

I would like to validate a username with these parameters: it may only contain

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I would like to validate a username with these parameters: “it may only contain alphanumeric characters or dashes and cannot begin with a dash and must have a length between 2-20 characters”

this is my attempt, but it’s not quite right

/^[a-z0-9]+([a-z0-9-]+[a-z0-9])?$/i

thanks for any help

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1 Answer

  1. Editorial Team
    /^[a-z0-9][-a-z0-9]{1,19}$/i

    [^-] allows all sorts of non alphanumeric characters.

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