Fix "Invalid value used as weak map key" error (T1186521) (#25491)

packages/devextreme/js/events/core/events_engine.js

@@ -4,7 +4,7 @@ import domAdapter from '../../core/dom_adapter';
 import { getWindow, hasWindow } from '../../core/utils/window';
 const window = getWindow();
 import injector from '../../core/utils/dependency_injector';
-import { isWindow, isFunction, isString } from '../../core/utils/type';
+import { isWindow, isFunction, isString, isObject } from '../../core/utils/type';
 import Callbacks from '../../core/utils/callbacks';
 import errors from '../../core/errors';
 import hookTouchProps from '../../events/core/hook_touch_props';
@@ -113,7 +113,8 @@ const eventsEngine = injector({
         if(!noBubble) {
             const parents = [];
             const getParents = function(element) {
-                const parent = element.parentNode ?? element.host;
+                const parent = element.parentNode
+                    ?? (isObject(element.host) ? element.host : null);
                 if(parent) {
                     parents.push(parent);
                     getParents(parent);

packages/devextreme/testing/tests/DevExpress.ui.events/eventsEngine.tests.js

@@ -639,3 +639,13 @@ QUnit.test('Hover events should be ignored if the target is a child of the curre
 
     assert.ok(handlerSpy.notCalled);
 });
+
+QUnit.test('There is no exception if element "A" was clicked while element has no parent (T1186521)', function(assert) {
+    const el = document.createElement('a');
+
+    el.setAttribute('href', '#');
+
+    eventsEngine.trigger(el, 'click');
+
+    assert.ok(true, 'no exceptions were fired');
+});