Replace unnecessary function supportsCursorURIs by a constant variable

kasmweb/core/util/browser.js

@@ -25,29 +25,23 @@ window.addEventListener('touchstart', function onFirstTouch() {
 // brings us a bit closer but is not optimal.
 export let dragThreshold = 10 * (window.devicePixelRatio || 1);
 
-let _cursor_uris_supported = null;
+let _supportsCursorURIs = false;
 
-export function supportsCursorURIs() {
-    if (_cursor_uris_supported === null) {
 try {
     const target = document.createElement('canvas');
     target.style.cursor = 'url("data:image/x-icon;base64,AAACAAEACAgAAAIAAgA4AQAAFgAAACgAAAAIAAAAEAAAAAEAIAAAAAAAEAAAAAAAAAAAAAAAAAAAAAAAAAD/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////AAAAAAAAAAAAAAAAAAAAAA==") 2 2, default';
 
     if (target.style.cursor) {
         Log.Info("Data URI scheme cursor supported");
-                _cursor_uris_supported = true;
+        _supportsCursorURIs = true;
     } else {
         Log.Warn("Data URI scheme cursor not supported");
-                _cursor_uris_supported = false;
     }
 } catch (exc) {
     Log.Error("Data URI scheme cursor test exception: " + exc);
-            _cursor_uris_supported = false;
-        }
 }
 
-    return _cursor_uris_supported;
-}
+export const supportsCursorURIs = _supportsCursorURIs;
 
 let _supportsImageMetadata = false;
 try {

kasmweb/core/util/cursor.js

@@ -6,7 +6,7 @@
 
 import { supportsCursorURIs, isTouchDevice } from './browser.js';
 
-const useFallback = !supportsCursorURIs() || isTouchDevice;
+const useFallback = !supportsCursorURIs || isTouchDevice;
 
 export default class Cursor {
     constructor() {