Question

49

To check if a string is alphanumeric in javascript

rated 0 times [ 50] [ 1] / answers: 1 / hits: 80584 / 11 Years ago, tue, april 30, 2013, 12:00:00

I want to check if a string is STRICTLY ALPHANUMERIC in javascript.
i have tried this:

var Exp = /^[0-9a-z]+$/;

if(!pwd.match(Exp))

alert(ERROR)

But the problem with this is it passes input sting if it contains all alphabet or all numeric, i want the function to pass if it contains both Characters and Numbers.

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eddiejoshb

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4 Years ago

answered 11 Years ago susanajamiep · Accepted Answer

Try this regex:

/((^[0-9]+[a-z]+)|(^[a-z]+[0-9]+))+[0-9a-z]+$/i

Which allows only Alphanumeric.

It doesn't allow:

Only Alpha

Only Numbers

Refer LIVE DEMO

Updated:

Below regex allows:

/^([0-9]|[a-z])+([0-9a-z]+)$/i

AlphaNumeric

Only Alpha

Only Numbers