Question

163

Special character validation

rated 0 times [ 164] [ 1] / answers: 1 / hits: 91838 / 11 Years ago, tue, may 21, 2013, 12:00:00

I have some javascript written to validate that a string is alphanumeric but i was just wondering how i could add some code to include hyphens(-) and slash's(/) as acceptable inputs. Here is my current code:

function validateAddress() {

  var address = document.getElementById('address');



  if (address.value == ) {

    alert(Address must be filled out);

    return false;

  } else if (document.getElementById('address').value.length > 150) {

    alert(Address cannot be more than 150 characters);

    return false;

  } else if (/[^a-zA-Z0-9-/]/.test(address)) {

    alert('Address can only contain alphanumeric characters, hyphens(-) and back slashs()');

    return false;

  }

}

Answers

Only authorized users can answer the question. Please sign in first, or register a free account.

mira

Add To Favorites

Follow

Total Points: 460

Total Questions: 108

Total Answers: 99

Location: American Samoa

Member since Fri, Aug 26, 2022

2 Years ago

mira questions

1 Nodemon: app crashed waiting for file changes before starting... on Windows

Mon, Apr 4, 22, 00:00, 2 Years ago

1 Unhandled promise rejection: ReferenceError Can't find variable

Mon, Feb 14, 22, 00:00, 2 Years ago

1 momentjs datetime format on frontend with angular

Wed, Feb 9, 22, 00:00, 2 Years ago

1 How to check if element exists in DOM in Cypress?

Sun, Mar 28, 21, 00:00, 3 Years ago

1 How do I get the IP of a user in Nuxt's asyncData method?

Sat, Aug 3, 19, 00:00, 5 Years ago

View All

answered 11 Years ago kaitlyn · Accepted Answer

Simply add them to the character group. Of course, because both - and / are special characters in this context (/ ends a RegExp, - expresses a range), you'll need to escape them with a preceding :

function validateAddress(){

    var TCode = document.getElementById('address').value;



    if( /[^a-zA-Z0-9-/]/.test( TCode ) ) {

        alert('Input is not alphanumeric');

        return false;

    }



    return true;     

}