Merge pull request #2744 from adumesny/master

remove dataTransfer mention as not supported

Author: adumesny

demo/drag-and-drop-dataTransfer-angular.ts

@@ -118,6 +118,7 @@ Change log
 * fix: [#2741](https://github.com/gridstack/gridstack.js/pull/2741) resizeToContent JS error with nested grid
 * fix: [#2740](https://github.com/gridstack/gridstack.js/bug/2740) nested grid drag fix
 * fix: [#2730](https://github.com/gridstack/gridstack.js/bug/2730) resizing left from right most item works
+* fix: [#2327](https://github.com/gridstack/gridstack.js/bug/2327) remove dataTransfer mention as not supported
 
 ## 10.3.0 (2024-06-26)
 * fix: [#2720](https://github.com/gridstack/gridstack.js/pull/2720) load() now creates widgets in order (used to be reverse due to old collision code)

demo/drag-and-drop-dataTransfer.html

@@ -530,10 +530,6 @@ export class Utils {
       cancelable: true,
       target: info.target ? info.target : e.target
     };
-    // don't check for `instanceof DragEvent` as Safari use MouseEvent #1540
-    if ((e as DragEvent).dataTransfer) {
-      evt['dataTransfer'] = (e as DragEvent).dataTransfer; // workaround 'readonly' field.
-    }
     ['altKey','ctrlKey','metaKey','shiftKey'].forEach(p => evt[p] = e[p]); // keys
     ['pageX','pageY','clientX','clientY','screenX','screenY'].forEach(p => evt[p] = e[p]); // point info
     return {...evt, ...obj} as unknown as T;