validating regex input fields

Question

I get an alert telling me the address needs to contain only alpha numeric chars..

What i have for the regex is /^\w+$/

so when i put 123 Lane Street

it gives me that error. Any ideas why it's doing this?

 if (address == ""){
                  errors += "please enter a address \n";
                } else { 
                    addressRE = /^\w+$/;
                    if (address.match(addressRE)){
                      //console.log("address match");
                      //do nothing.
                    } else {
                      //console.log("address not a match");
                      errors += "Address should only contain alphanumeric characters \n";
                    } // end if
                }

yes, it would show the error because the address contain spaces. — Avinash Raj
– Avinash Raj, Commented Jul 14, 2014 at 4:54
In addition, rubular.com is a quick and interactive way to learn regex. Try it out with the addresses above. you can use this expression also :^[a-zA-Z\d\s]* — user3819365
– user3819365, Commented Jul 14, 2014 at 5:33

zx81 · Accepted Answer · 2014-07-14 05:01:36Z

2

The space character in 123 Lane is not considered to be alphanumeric.

You need /^[a-z0-9 ]+$/i

The i turns on case-insensitive matching.

In JS:

if (/^[a-z0-9 ]+$/i.test(yourString)) {
    // It matches!
} else {
    // Nah, no match...
}

edited Jul 14, 2014 at 5:01

answered Jul 14, 2014 at 4:54

zx81

42k10 gold badges92 silver badges106 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

Avinash Raj Over a year ago

I think your answer matches a single character.

zx81 Over a year ago

@AvinashRaj You're totally right, I forgot the +. I often do that. Thanks a lot. :)

Collectives™ on Stack Overflow

validating regex input fields

1 Answer 1

2 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

2 Comments

Your Answer

Sign up or log in

Post as a guest

Related