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Home/ Questions/Q 8651483
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Editorial Team
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Editorial Team
Asked: June 12, 20262026-06-12T14:05:03+00:00 2026-06-12T14:05:03+00:00

I am very new to regex and JavaScript. I need a regex for validate

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I am very new to regex and JavaScript.

I need a regex for validate only alphanumeric characters and full stop (.), comma(,), colon(:), and semicolon(;).

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  1. Editorial Team
    Editorial Team
    2026-06-12T14:05:04+00:00Added an answer on June 12, 2026 at 2:05 pm

    If you want to verify that the complete line contains only the allowed characters:

    var regexp = new RegExp(/^[a-zA-Z0-9.,:;]+$/);

    ^ matches at the beginning of the line

    [] matches one of the surrounded characters

    + makes the previous element one or more times

    $ matches the end of the line

    If the string is allowed to be empty, then turn the + into a *

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