For instance:
'1' => NG
'243' => NG
'1av' => OK
'pRo' => OK
'123k%' => NG
I tried with
/^(?=^[^0-9]*$)(?=[a-zA-Z0-9]+)$/
but it is not working very well.
For instance: ‘1’ => NG ‘243’ => NG ‘1av’ => OK ‘pRo’ => OK
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For instance:
'1' => NG
'243' => NG
'1av' => OK
'pRo' => OK
'123k%' => NG
I tried with
/^(?=^[^0-9]*$)(?=[a-zA-Z0-9]+)$/
but it is not working very well.
Use
This expression has a negative lookahead to verify that the string is not only numbers. See it in action with RegExr.