Preset given nested dropdown on Zendesk Help Center with a given value

preset_nested_dropdown.js

/**
*	Preset given nested dropdown on Zendesk Help Center with a given value
*	
*	@param {String} field_id (example: 'request_custom_fields_31265065')
*	@param {String} field_value (example: 'complaint_type_b')
*/
function presetNestedDrodown(field_id,field_value){
	if (!field_id || field_value === undefined) return;
	var $field = $('.'+field_id);
	if ($field && $field.length > 0 && $field.hasClass('string')) {
		var $input = $field.find('input'), $d = $input.attr('data-tagger');
		$d && JSON.parse($d).forEach(function(obj){
			if (obj.value === field_value) $input.val(obj.value).closest('.nesty-input').text(obj.label);
		});
	}
}

presetNestedDrodown('request_custom_fields_23496063','corolla');
// presetNestedDrodown('request_custom_fields_23530886','accord');
// presetNestedDrodown('request_custom_fields_23502577','blahhhh');
// presetNestedDrodown('request_custom_fields_23506078','toyota_ncr');
// presetNestedDrodown('request_custom_fields_31265065','complaint_type_b');