HillbillyCascade

/*

• HillbillyCascade - Create cascading drop downs for SharePoint 2013/2016/O365 classic forms
• Version 2.0
• @requires jQuery v1.7 or greater
• @requires unslider
• Copyright (c) 2017 Mark Rackley / PAIT Group
• Licensed under the MIT license:
• http://www.opensource.org/licenses/mit-license.php / /*
• @description Create cascading drop downs for SharePoint 2013/2016/O365 classic forms
• @type jQuery
• @name HillbillyCascade
• @category Plugins/HillbillyCascade
• @author Mark Rackley / http://www.markrackley.net / mrackley@paitgroup.com
• Usage:
• var cascadeArray = new Array();
• cascadeArray.push({

•  	parentFormField: "County", //Display name on form of field from parent list
  

•  	childList: "Cities", //List name of child list
  

•  	childLookupField: "Title", //Internal field name in Child List used in lookup
  

•  	childFormField: "City", //Display name on form of the child field
  

•  	parentFieldInChildList: "County", //Internal field name in Child List of the parent field
  

•  	firstOptionText: "< Select a City >"
  

•  });
  

•  $().HillbillyCascade(cascadeArray);
  

*/

HillbillyCascade works with mutli-level cascading dropdowns, simply create an array entry for each subsequent cascade.