The mobile number field must allow a minimum of 10 digits including only one "+" sign.

Ria · ‎05-22-2025

Ankur Bawiskar · ‎05-26-2025

then use this

// onChange Client Script for mobile_number field
// Type: onChange
// Field name: mobile_number

function onChange(control, oldValue, newValue, isLoading, isTemplate) {
    if (isLoading || newValue == '') {
        return;
    }

    // Remove all spaces for validation
    var value = newValue.replace(/\s/g, '');

    // Regex: Must start with '+', followed by exactly 10 digits, nothing else
    var regex = /^\+\d{10}$/;

    if (!regex.test(value)) {
        g_form.showFieldMsg(
            'mobile_number',
            'Please enter a valid mobile number: must start with "+" and be followed by exactly 10 digits.',
            'error'
        );
        g_form.clearValue('mobile_number');
    } else {
        g_form.hideFieldMsg('mobile_number');
    }
}

If my response helped please mark it correct and close the thread so that it benefits future readers.

Regards,
Ankur
✨ Certified Technical Architect || ✨ 9x ServiceNow MVP || ✨ ServiceNow Community Leader

View solution in original post

AmM01 · ‎05-22-2025

Could you please elaborate and provide more information?

harish41 · ‎05-22-2025

Hi @Ria

You can try below script.

function onChange(control, oldValue, newValue, isLoading, isTemplate) {
   if (isLoading || newValue === '') {
      return;
   }


			var length = g_form.getValue('u_mobile_phone').length;
			if(length != 10)
				{
					g_form.clearValue('u_mobile_phone');
					g_form.showErrorBox('u_mobile_phone', 'enter 10 digits only');
				}
			else
				{
					g_form.setValue('u_mobile_phone', '+' + newValue);
				}
		}

You can refer to the scripts mentioned in these threads :
https://www.servicenow.com/community/itsm-forum/help-in-phone-number-formatting-in-variable/m-p/5704...
https://www.servicenow.com/community/developer-articles/field-validation-regular-expressions/ta-p/23...

Mark as correct and helpful if it solved your query.

Regards,
Harish

Ria · ‎05-26-2025

Hi @harish41

I checked the script above, and it currently doesn't accept the plus sign. I would like to include a plus sign followed by 10 digits.

Regards,

Riya

AshishKM · ‎05-22-2025

Hi @Ria,

Please share more details, where you are configuring this variable setting.

However, you can configure the Regular Expression and use this regex with phone number variable.

/^[+-]?\d{10}$/

Let us know if this works for you.

-Thanks,

AshishKM

Please mark this response as correct and helpful if it helps you can mark more that one reply as accepted solution