Custom JS validation for the following fields (billing_address_1, shipping_address_1)

custom_address_1_js_validation.js

jQuery( document.body ).on( 'cartimize_shipping_address_1_validation', function(event, defaultResult, fieldValue){
    		//Your custom code. Return true or false else it will use default validation
            //Example: Validation for specific countries.
            var selectedCountry = jQuery("#shipping_country").val();
            if(selectedCountry == 'NL' || selectedCountry == 'BEL' || selectedCountry == 'CZE'){
            	return /\d/.test(fieldValue);
            }

		});

jQuery( document.body ).on( 'cartimize_biiling_address_1_validation', function(event, defaultResult, fieldValue){
    		//Your custom code. Return true or false else it will use default validation
            //Example: Validation for specific countries.
            var selectedCountry = jQuery("#billing_country").val();
            if(selectedCountry == 'NL' || selectedCountry == 'BEL' || selectedCountry == 'CZE'){
            	return /\d/.test(fieldValue);
            }

		});

// This will change the shipping and billing label based on country
jQuery( document.body ).on( 'country_to_state_changing', function(event){
	var selectedCountry = jQuery("#shipping_country").val();
	 if(selectedCountry == 'NL' || selectedCountry == 'BEL' || selectedCountry == 'CZE'){
		jQuery(".shipping_address_1 label").text('Street address (with house number)');
	}else{
		jQuery(".shipping_address_1 label").text('Street address');
	}
	
	selectedCountry = jQuery("#billing_country").val();
	 if(selectedCountry == 'NL' || selectedCountry == 'BEL' || selectedCountry == 'CZE'){
		jQuery(".billing_address_1 label").text('Street address (with house number)');
	}else{
		jQuery(".billing_address_1 label").text('Street address');
	}

});