fixed $ is undefined errors

src/js/dom-util.js

@@ -1,3 +1,5 @@
+import { $ } from "jquery";
+
 export function showBackgroundLoader() {
   $("#backgroundLoader").stop(true, true).fadeIn(125);
 }

src/js/misc.js

@@ -1,4 +1,5 @@
 import { showBackgroundLoader, hideBackgroundLoader } from "./dom-util";
+import { $, moment } from "jquery";
 
 let themesList = null;
 export async function getThemesList() {

src/js/script.js

@@ -4740,7 +4740,7 @@ $(document).keydown(function (event) {
     activeFunBox === "nospace" &&
     currentInput.length === wordsList[currentWordIndex].length
   ) {
-    jQuery.event.trigger({
+    $.event.trigger({
       type: "keydown",
       which: " ".charCodeAt(0),
       key: " ",