diff --git a/client/src/modules/events.ts b/client/src/modules/events.ts
index e15f761..73022e0 100644
--- a/client/src/modules/events.ts
+++ b/client/src/modules/events.ts
@@ -6,25 +6,27 @@ import * as I from "../types/types";
 import * as JSC from "./jsc";
 import * as Cart from "./cart";
 
-export function addCloseModal() {
+export function addCloseModal(): void {
     const btnCloseModal: HTMLElement | undefined = jQuery("#btnCloseModal").get(0);
     if (btnCloseModal)
         btnCloseModal.addEventListener("click", () => Communication.sendEventToParent("child_closeDialog"));
 }
 
-export function addDropdownSeatmap(inPanzoom: any) {
+export function addDropdownSeatmap(inPanzoom: any): void {
     const dropdownSeatmap: HTMLElement | null = document.getElementById("dropdownSeatmap");
+
     if (dropdownSeatmap) {
         dropdownSeatmap.addEventListener("change", function (this: HTMLSelectElement) {
-            UI.controlLoftloader("show");
+            UI.controlLoftloader("show"); // todo: rewrite?
             UI.destroyCurrentSeatmap("#containerSeatmapInner", inPanzoom);
             Communication.needSeatmapXML(this.value);
         });
     }
 }
 
-export function addModalCart() {
+export function addModalCart(): void {
     const btnCart: HTMLElement | undefined = jQuery("#modalCart .uabb-button").get(0);
+
     if (btnCart) {
         btnCart.addEventListener("click", () => {
             if (!config.state.selectedSeatsArr.length)
@@ -39,13 +41,13 @@ export function addModalCart() {
     }
 }
 
-export function addRedirectCheckout(inUrl: string | undefined) {
+export function addRedirectCheckout(inUrl: string | undefined): void {
     if (!inUrl)
         return;
 
     const btnCheckout = jQuery("#modalCart-overlay #checkout .fl-button").get(0);
     if (btnCheckout) {
-        btnCheckout.addEventListener("click", function () {
+        btnCheckout.addEventListener("click", () => {
             const message: I.Message = {
                 message: {
                     url: inUrl,
@@ -59,27 +61,22 @@ export function addRedirectCheckout(inUrl: string | undefined) {
     }
 }
 
-export function addCartClose() {
-    const btnClose = jQuery("#modalCart-overlay .uabb-close-icon").get(0);
-    if (btnClose) {
-        btnClose.addEventListener("click", function () {
-            Communication.sendEventToParent("child_show_dialog_titlebar");
-        });
-    }
+export function addCartClose(): void {
+    const btnClose: HTMLElement = jQuery("#modalCart-overlay .uabb-close-icon").get(0);
+    if (btnClose)
+        btnClose.addEventListener("click", () => Communication.sendEventToParent("child_show_dialog_titlebar"));
 }
 
-export function addCartBack() {
-    const btnBack = jQuery("#modalCart-overlay #goBack .fl-button").get(0);
-    if (btnBack) {
-        btnBack.addEventListener("click", function () {
-            jQuery("#modalCart-overlay .uabb-close-icon").trigger("click");
-        });
-    }
+export function addCartBack(): void {
+    const btnBack: HTMLElement = jQuery("#modalCart-overlay #goBack .fl-button").get(0);
+    if (btnBack)
+        btnBack.addEventListener("click", () => jQuery("#modalCart-overlay .uabb-close-icon").trigger("click"));
 }
 
-export function dropdownLegendOnChange(inSelector: string) {
-    const seatmap = config.state.seatmap;
-    const dropdownLegend = jQuery(inSelector).get(0);
+export function dropdownLegendOnChange(inSelector: string): void {
+    const seatmap: any = config.state.seatmap;
+    const dropdownLegend: HTMLElement = jQuery(inSelector).get(0);
+
     dropdownLegend.addEventListener("change", function (this: HTMLSelectElement) {
         const value: string = this.value;
         const className: string = `._${value}`;
@@ -95,11 +92,11 @@ export function dropdownLegendOnChange(inSelector: string) {
             JSC.activateSeatsBySectionID(value);
             JSC.setUnavailableSeats();
         }
-
     });
 }
 
-export function addCartDropdownBuyerTypes(inSelector: string, inSeatObj: I.JSCSelectedSeat) {
+export function addCartDropdownBuyerTypes(inSelector: string, inSeatObj: I.JSCSelectedSeat): void {
+    // todo: which variant is not deprecated?
     jQuery(inSelector).on('change', function (this: HTMLSelectElement) {
         Cart.changedDropdownBuyerType(this, inSeatObj);
     });