How to set up Service and Service Offering reference fields relationship so it is bi-directional?

[bbf35621]

I am creating a catalog item and I am adding two reference fields for service and service offering. The service offering table depends on the service table. The client requirements for these two,

- When you select a Service, related Service Offerings should be available.
- If Service is blank, Service Offerings should show all.
- When you select a Service Offering, related Service should auto-populate.
- Fields should clear if no relationship is found.

I created 2 onChange catalog client scripts for Service and Service Offering. For some reason, I made the service offering reference field work but not the service field. Does anyone have scripts that do the same as this?

Here is the catalog script I use,

onChange target field - service

function onChange(control, oldValue, newValue, isLoading) {
    if (newValue == '') {
        return;
    } else {
        var serOff = g_form.getReference('service_offering', doTheThing);
    }


    function doTheThing(serOff) {

        if (newValue != serOff.parent) {
            alert("doesn't match");
            
            g_form.setValue('service_offering', '');
			//need to update this line of code after clear the value by adding new options.
			
        } else {
            alert("match");
            return;
        }
    }

}

onChange target field - service offering

function onChange(control, oldValue, newValue, isLoading) {
     if (newValue === '') {		
        g_form.clearValue('service');
		return;
    } else {
        g_form.getReference('service_offering', returnTheServiceParent);

    }

    function returnTheServiceParent(bahOffering) {
        g_form.setValue('service', bahOffering.parent);
    }   
}