JS: Validate Scope Using jQuery Validate

validate-scope.js

'validate--scope-dependence': {
	required: function(element) {

		var hasFilled = !!$(element).closest('.validate--scope')
			.find('input, select, textarea')
			.not( element )
			.filter(function() {
				return $(this).val().length > 0;
			}).length;

		return hasFilled;
	}
}