String Validation (starts with)

[Derek10]

Greetings all,

I'm looking for some assistance on syntax for a series of start withs

IE if it startswith ABC, or XYZ or CAT.

I know it's a on change script for the variable, just not sure on how to match characters. (case insensitive)

Any thoughts?

[Raju Koyagura]

ServiceNow also supprots Regex so use SNC Regex API - ServiceNow Wiki

[dvp]

Here is the sample script

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

    if (isLoading || newValue === '') {

          return;

    }

    //Type appropriate comment here, and begin script below

    if (newValue.match(/^ABC|XYZ|CAT/i))

      {

              return true;

      }

      else{

              alert('Fail');

              g_form.clearValue('You Field Name');

      }

}

[Julie Benningfi]

This on-change client script worked perfectly for me - We have two fields on our work orders that require information from another system and folks were always entering the wrong things. Here's my version: 

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


    if (isLoading || newValue === '') {

        return;
    }

    //Type appropriate comment here, and begin script below
	
    if (newValue.match(/^SO/i))

    {

        return true;

    } else {

        alert('The Sales Order number must begin with SO...');

        g_form.clearValue('u_salesorder');

    }

[drjohnchun · Accepted solution]

Here's one way to do it using test():

if (/^(ABC|XYZ|CAT)/i.test(value)) {   /* process TRUE condition */   }   // starts with ABC or XYZ or CAT, ignore case

Hope this helps.

Please feel free to connect, follow, mark helpful / answer, like, endorse.

John Chun, PhD PMP

Winner of November 2016 Members' Choice Award