I have a regex 

> 
> `/^([a-zA-Z0-9]+)$/`
> 
> 
> 

this just allows only alphanumerics but also if I insert only number(s) or only character(s) then also it accepts it. I want it to work like the field should accept only alphanumeric values but the value must contain at least both 1 character and 1 number.