1 files changed, 10 insertions, 18 deletions

diff --git a/beamer/viewer/stage/actions.js b/beamer/viewer/stage/actions.js
index 30634ae..47eda60 100644
--- a/beamer/viewer/stage/actions.js
+++ b/beamer/viewer/stage/actions.js
@@ -1,6 +1,6 @@
 /*
  * Beamer Viewer, a web-based PDF presentation viewer
- * Copyright (C) 2018 Pacien TRAN-GIRARD
+ * Copyright (C) 2018-2023 Pacien TRAN-GIRARD
  * 
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU Affero General Public License as
@@ -27,10 +27,7 @@ class ActionEventHandler {
 
 class KeyboardEventHandler extends ActionEventHandler {
   register(window) {
-    const self = this;
-    window.addEventListener("keydown", function(event) {
-      self._onCommand(event);
-    })
+    window.addEventListener("keydown", event => this._onCommand(event));
   }
 
   _onCommand(keyboardEvent) {
@@ -52,10 +49,7 @@ class KeyboardEventHandler extends ActionEventHandler {
 
 class MouseClickEventHandler extends ActionEventHandler {
   register(window) {
-    const self = this;
-    window.addEventListener("click", function(event) {
-      self._onCommand(event);
-    })
+    window.addEventListener("click", event => this._onCommand(event));
   }
 
   _onCommand(mouseEvent) {
@@ -71,24 +65,22 @@ class TouchSwipeEventHandler extends ActionEventHandler {
   }
 
   register(window) {
-    const self = this;
-
-    window.addEventListener("touchstart", function(event) {
+    window.addEventListener("touchstart", event => {
       event.preventDefault();
-      self._onTouchStart(event);
+      this._onTouchStart(event);
     });
 
-    window.addEventListener("touchmove", function(event) {
+    window.addEventListener("touchmove", event => {
       event.preventDefault();
-      self._onTouchMove(event);
+      this._onTouchMove(event);
     });
 
-    window.addEventListener("touchend", function(event) {
+    window.addEventListener("touchend", event => {
       event.preventDefault();
-      self._onTouchEnd();
+      this._onTouchEnd();
     });
 
-    window.addEventListener("touchcancel", function(event) {
+    window.addEventListener("touchcancel", event => {
       event.preventDefault();
     });
   }