question Re: String Validation (starts with) in Developer forum

String Validation (starts with)

Derek10 — Tue, 20 Dec 2016 20:29:26 GMT

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?

Re: String Validation (starts with)

Raju Koyagura — Tue, 20 Dec 2016 20:32:46 GMT

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

Re: String Validation (starts with)

dvp — Tue, 20 Dec 2016 21:07:39 GMT

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');

}

Re: String Validation (starts with)

drjohnchun — Tue, 20 Dec 2016 21:35:30 GMT

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

Re: String Validation (starts with)

Derek10 — Wed, 21 Dec 2016 13:23:06 GMT

Thank you all for your assistance, all of you have been helpful in this. I had to mark the most useful as correct as it directly correlated to my scenario. But I appreciate the other two and can reference them as well in future endeavors!.

Re: String Validation (starts with)

Julie Benningfi — Tue, 31 Mar 2020 20:33:45 GMT

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');

    }