How to check to see if any numbers or letters exist in a string in JavaScript?

Question

I need to check to see if a string has at least a letter OR number. What would be the best way to check that?

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– Lightness Races in Orbit, Commented Jun 9, 2011 at 18:11

Gabi Purcaru · Accepted Answer · 2011-06-09 18:12:52Z

4

Use a simple regex:

/[0-9a-zA-Z]/.test(some_string);

answered Jun 9, 2011 at 18:12

Gabi Purcaru

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3 Comments

Clean and simple. Extract to a variable if you want to re-use the expression.

/[A-Z0-9]/i.test(str) slightly shorter

/[0-9a-z]/i would also be possible, just for the record.