Userscript to add a "term" parameter in the url to allow filtering of CloudFormation listings

cloudformation.user.js

// ==UserScript==
// @name CloudFormation Filter
// @namespace http://tampermonkey.net/
// @version 0.99a
// @description add filterability to the CloudFormation URL template via a "term" query parameter in the hash
// @author rektide
// @match https://console.aws.amazon.com/cloudformation/home*
// @grant none
// ==/UserScript==

(function() {
	'use strict';
	function changeEvent(){
		var changeEvent = document.createEvent("HTMLEvents");
		changeEvent.initEvent("change", true, false); // name, bubble, cancel
		return changeEvent;
	}
	function initKeyboardEvent( type, bubbles, cancelable, view, ctrlKey, altKey, shiftKey, metaKey, keyCode, charCode){
		// keycode comes out 0?!
		//var kbEvent= new KeyboardEvent( type, {
		//	bubbles,
		//	cancelable,
		//	view,
		//	ctrlKey,
		//	altKey,
		//	shiftKey,
		//	metaKey,
		//	keyCode,
		//	charCode
		//});

		// keycode comes out 0?!
		//var kbEvent= document.createEvent( "KeyboardEvent");
		//kbEvent.initKeyboardEvent( type, bubbles, cancelable, view, ctrlKey, altKey, shiftKey, metaKey, keyCode, charCode);

		// the old way. not a fan (versus the above ones) but it works.
		var kbEvent = document.createEvent( "HTMLEvents");
		kbEvent.initEvent( "keydown", true, true);
		kbEvent.keyCode= 13;
		kbEvent.charCode= 13;
		kbEvent.which= 13;

		// not being accepted from constructor?!
		if(kbEvent.keyCode != keyCode){
			console.log("WHAT THE HELL?!", kbEvent.keyCode);
		}

		return kbEvent;
	}
	function enterEvent(){
		var enterDownKey= initKeyboardEvent( "keydown", true, true, window, false, false, false, false, 13, 0);
		return enterEvent;
	}

	// focus on the search box
	var search= document.getElementById( "stackNameFilter");
	search.focus();

	// fill in "term" filter
	if( !window.location.hash) return;
	var
	  searchParams= new URLSearchParams( window.location.hash),
	  term= searchParams.get( "term"),
	  change= changeEvent();
	search.value= term;
	search.dispatchEvent(changeEvent);

	// pause then hit enter
	var enter= enterEvent();
	setTimeout( search.dispatchEvent.bind( search, enter), 200);
})();