Comparing 2 fields while filling up a form

[Momiji]

Hi! I'm trying to compare 2 fields (FieldA, FieldB) in a form. Both fields' type is Choice. FieldB must be different from FieldA. An error message will pop-up when the selected value for FieldB is the same as FieldA. I've created an onchange client script but it seems to be not working:

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

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

        return;

    }

    var fieldA = g_form.getValue('FieldA');

    var fieldB = g_form.getValue('FieldB');

    if (fieldA && fieldB) {

        // Check if both fields have values

        if (fieldA === fieldB) {

            // If both fields have the same value, show an alert          

            alert('Selection of FieldB must be different from FieldA');

        }

    }

}

[anshul_goyal]

Hello @Momiji,

Here's a more reliable version of your onChange script, assuming that your onChange client script running on FieldB:

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

    var fieldA = g_form.getValue('FieldA');
    var fieldB = newValue; // use the newValue parameter directly for FieldB

    if (fieldA && fieldB) {
        if (fieldA === fieldB) {
            alert('Your Message Here.');
        } 
    }
}

Please mark my response as Accepted and Helpful for future references.

Best Regards,
Anshul

[SN_Learn]

Hi @Momiji ,

Please try the below:

function onChange(control, oldValue, newValue, isLoading, isTemplate) {
    if (isLoading || newValue === '') {
        return;
    }
    g_form.clearMessages();
    var fieldA = g_form.getValue('u_choice_1');
    if (fieldA && newValue) {

        if (newValue === fieldA) {
            g_form.addErrorMessage('Selection of FieldB must be different from FieldA');
        }

    }
}

Also, make sure the backend name of the choices for both the fields are same:

[Ankur Bawiskar · Accepted solution]

@Momiji 

you will have to write 2 onchange client scripts for this

1st on field A and another on field B

why not use single onSubmit and validate it?

Note: the  below script will work only when both the field have exact same choice values, if not then it won't work

function onSubmit() {

    var fieldA = g_form.getValue('FieldA');
    var fieldB = g_form.getValue('FieldB');

    if (fieldA && fieldB) {
        if (fieldA === fieldB) {
            alert('Your Message Here.');
            return false;
        }
    }
}

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