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Asked: 2026-05-13T22:31:18+00:00

In javascript I check for some characters but I want to allow underscores and

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In javascript I check for some characters but I want to allow underscores and slashes but I don’t know how. 

    alias: /^[a-z-Z0-9]{2,35}$/

How to put / and _ so it has not special meaning to Regexes.

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  1. Editorial Team

    _ has no special meaning at all in Regex.

    And if a character has special meaning, you can use \ to “despecialize” it.

    alias: /^[a-zA-Z0-9_\/]{2,35}/

    (BTW, you can use \w which means [a-zA-Z0-9_], i.e. /^[\w\/]{2,35}/. The \ in \w turns a normal character w to have a special meaning.)

    (Edit: Inside the […] the / will not be recognized as a delimiter so it is safe to use /^[\w/]{2,35}/. Thanks Andy E for showing this.)

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