fix: Row Detail open/close multiple times should always re-render

src/app/modules/angular-slickgrid/extensions/__tests__/slickRowDetailView.spec.ts

@@ -262,35 +262,39 @@ describe('SlickRowDetailView', () => {
         expect(onRowBackViewSpy).not.toHaveBeenCalled();
       });
 
-      it('should call internal event handler subscribe and expect the "onAsyncEndUpdate" option to be called when addon notify is called', () => {
-        // const handlerSpy = vi.spyOn(plugin.eventHandler, 'subscribe');
-        const renderSpy = vi.spyOn(plugin, 'renderViewModel');
+      it('should call internal event handler subscribe and expect the "onAsyncEndUpdate" option to be called when addon notify is called', () =>
+        new Promise((done: any) => {
+          // const handlerSpy = vi.spyOn(plugin.eventHandler, 'subscribe');
+          const renderSpy = vi.spyOn(plugin, 'renderViewModel');
 
-        const onAsyncRespSpy = vi.spyOn(gridOptionsMock.rowDetailView as RowDetailView, 'onAsyncResponse');
-        const onAsyncEndSpy = vi.spyOn(gridOptionsMock.rowDetailView as RowDetailView, 'onAsyncEndUpdate');
-        const onAfterRowSpy = vi.spyOn(gridOptionsMock.rowDetailView as RowDetailView, 'onAfterRowDetailToggle');
-        const onBeforeRowSpy = vi.spyOn(gridOptionsMock.rowDetailView as RowDetailView, 'onBeforeRowDetailToggle');
-        const onRowOutViewSpy = vi.spyOn(gridOptionsMock.rowDetailView as RowDetailView, 'onRowOutOfViewportRange');
-        const onRowBackViewSpy = vi.spyOn(gridOptionsMock.rowDetailView as RowDetailView, 'onRowBackToViewportRange');
+          const onAsyncRespSpy = vi.spyOn(gridOptionsMock.rowDetailView as RowDetailView, 'onAsyncResponse');
+          const onAsyncEndSpy = vi.spyOn(gridOptionsMock.rowDetailView as RowDetailView, 'onAsyncEndUpdate');
+          const onAfterRowSpy = vi.spyOn(gridOptionsMock.rowDetailView as RowDetailView, 'onAfterRowDetailToggle');
+          const onBeforeRowSpy = vi.spyOn(gridOptionsMock.rowDetailView as RowDetailView, 'onBeforeRowDetailToggle');
+          const onRowOutViewSpy = vi.spyOn(gridOptionsMock.rowDetailView as RowDetailView, 'onRowOutOfViewportRange');
+          const onRowBackViewSpy = vi.spyOn(gridOptionsMock.rowDetailView as RowDetailView, 'onRowBackToViewportRange');
 
-        plugin.init(gridStub);
-        plugin.onAsyncEndUpdate = new SlickEvent();
-        plugin.register();
-        plugin.onAsyncEndUpdate.notify({ item: columnsMock[0], itemDetail: columnsMock[0], grid: gridStub }, new SlickEventData(), gridStub);
+          plugin.init(gridStub);
+          plugin.onAsyncEndUpdate = new SlickEvent();
+          plugin.register();
+          plugin.onAsyncEndUpdate.notify({ item: columnsMock[0], itemDetail: columnsMock[0], grid: gridStub }, new SlickEventData(), gridStub);
 
-        // expect(handlerSpy).toHaveBeenCalledTimes(8); // there are an extra 2x on the grid itself
-        // expect(handlerSpy).toHaveBeenCalledWith(
-        //   { notify: expect.anything(), subscribe: expect.anything(), unsubscribe: expect.anything(), },
-        //   expect.anything()
-        // );
-        expect(onAsyncRespSpy).not.toHaveBeenCalled();
-        expect(onAsyncEndSpy).toHaveBeenCalledWith(expect.anything(), { item: columnsMock[0], itemDetail: columnsMock[0], grid: gridStub });
-        expect(renderSpy).toHaveBeenCalledWith({ cssClass: 'red', field: 'field1', id: 'field1', width: 100 });
-        expect(onAfterRowSpy).not.toHaveBeenCalled();
-        expect(onBeforeRowSpy).not.toHaveBeenCalled();
-        expect(onRowOutViewSpy).not.toHaveBeenCalled();
-        expect(onRowBackViewSpy).not.toHaveBeenCalled();
-      });
+          // expect(handlerSpy).toHaveBeenCalledTimes(8); // there are an extra 2x on the grid itself
+          // expect(handlerSpy).toHaveBeenCalledWith(
+          //   { notify: expect.anything(), subscribe: expect.anything(), unsubscribe: expect.anything(), },
+          //   expect.anything()
+          // );
+          setTimeout(() => {
+            expect(onAsyncRespSpy).not.toHaveBeenCalled();
+            expect(onAsyncEndSpy).toHaveBeenCalledWith(expect.anything(), { item: columnsMock[0], itemDetail: columnsMock[0], grid: gridStub });
+            expect(renderSpy).toHaveBeenCalledWith({ cssClass: 'red', field: 'field1', id: 'field1', width: 100 });
+            expect(onAfterRowSpy).not.toHaveBeenCalled();
+            expect(onBeforeRowSpy).not.toHaveBeenCalled();
+            expect(onRowOutViewSpy).not.toHaveBeenCalled();
+            expect(onRowBackViewSpy).not.toHaveBeenCalled();
+            done();
+          });
+        }));
 
       it('should call internal event handler subscribe and expect the "onAfterRowDetailToggle" option to be called when addon notify is called', () => {
         // const handlerSpy = vi.spyOn(plugin.eventHandler, 'subscribe');

src/app/modules/angular-slickgrid/extensions/slickRowDetailView.ts

@@ -151,11 +151,14 @@ export class SlickRowDetailView extends UniversalSlickRowDetailView {
           this._preloadCompRef?.destroy();
 
           // triggers after backend called "onAsyncResponse.notify()"
-          this.renderViewModel(args?.item);
+          // because of the preload destroy above, we need a small delay to make sure the DOM element is ready to render the Row Detail
+          queueMicrotask(() => {
+            this.renderViewModel(args?.item);
 
-          if (this.rowDetailViewOptions && typeof this.rowDetailViewOptions.onAsyncEndUpdate === 'function') {
-            this.rowDetailViewOptions.onAsyncEndUpdate(e, args);
-          }
+            if (this.rowDetailViewOptions && typeof this.rowDetailViewOptions.onAsyncEndUpdate === 'function') {
+              this.rowDetailViewOptions.onAsyncEndUpdate(e, args);
+            }
+          });
         });
 
         this.eventHandler.subscribe(

test/cypress/e2e/example21.cy.ts

@@ -245,4 +245,21 @@ describe('Example 21 - Row Detail View', () => {
 
     cy.get('#grid21').find('.slick-cell + .dynamic-cell-detail .innerDetailView_101').should('not.exist');
   });
+
+  it('should expect the Row Detail to be re-rendered after expanding/collapsing multiple times', () => {
+    cy.get('#grid21').find('.slick-row:nth(1) .slick-cell:nth(0)').as('toggle1');
+    cy.get('@toggle1').click();
+    cy.get('@toggle1').click();
+    cy.get('@toggle1').click();
+
+    cy.get('#grid21').find('.slick-cell + .dynamic-cell-detail .innerDetailView_1').as('detailContainer');
+    cy.get('@detailContainer').find('h3').contains('Task 1');
+
+    cy.get('@toggle1').click();
+    cy.get('@detailContainer').should('not.exist');
+
+    cy.get('@toggle1').click();
+    cy.get('#grid21').find('.slick-cell + .dynamic-cell-detail .innerDetailView_1').as('detailContainer');
+    cy.get('@detailContainer').find('h3').contains('Task 1');
+  });
 });