regex - Regular Expression for Alphanumeric, Hyphen and Space -

i have regular expression checks if string contains alphanumeric , hyphen.

this regular expression alphanumeric validation only:

var numericreg = /^([a-za-z0-9]){1,20}$/;

to which, need include hyphen , space too.

that means, value "100-c09d10 a" must possible enter.

try this

^([-a-za-z0-9]){1,20}$ 

or this

^([a-za-z0-9-]){1,20}$ 

i think using js. should work. check here. if want include space add space in character class

^([-a-za-z0-9 ]){1,20}$ 

always remember - in character class used denoting range usually. if want include hyphen should either add beginning or end of character class or \ suggested in other answer