Create an Only Number Field From String Field

[kiley]

So obviously ServiceNow still does not have restricted-to-numbers fields. I know I am not the only one who would like a basic or easy way of creating one, so does anyone have any ideas? Also, is it possible to have a field not accept letters at all, meaning if they try to type letters into the field they do not show up? I was thinking something along the lines of an "onChange" situation, but they would still be able to input the letters in the first place.

Thank you in advance!

[Mike Allen · Accepted solution]

Regex is the way to do this:

function onChange(control, oldValue, newValue, isLoading) {



   if (isLoading ) {

   return;

   }



   if(oldValue != newValue){



   var VALIDCHARS = "1234567890";

   var number   = newValue.trim();

   var regEx = "^[0-9]*$";

   var rtn = number.match(regEx);

   g_form.hideFieldMsg('number', true);

   if (rtn == null) {

   g_form.showFieldMsg('number', number + " is an invalid   number, please re-enter using only characters from " + VALIDCHARS ,'error');

   return;

   }

   }



}

[kiley]

I am a little confused about rtn. Does that determine if the input matches the regEx setup? Is groupPhone your variable?

[Mike Allen]

Sorry, I pulled it from a phone number field and tried to genericize.   Let me look at it.

It would be number.match in this.