Tweakhancement: use fixed position instead of display none (#12706)

src-ui/src/app/components/document-detail/document-detail.component.spec.ts

@@ -2221,10 +2221,20 @@ describe('DocumentDetailComponent', () => {
     expect(createElementSpy).toHaveBeenCalledWith('iframe')
     expect(appendChildSpy).toHaveBeenCalledWith(mockIframe)
     expect(createObjectURLSpy).toHaveBeenCalledWith(blob)
+    expect(mockIframe.style).toEqual({
+      position: 'fixed',
+      right: '0',
+      bottom: '0',
+      width: '0',
+      height: '0',
+      border: '0',
+      visibility: 'hidden',
+    })
 
     if (mockIframe.onload) {
       mockIframe.onload({} as any)
     }
+    tick()
 
     expect(mockContentWindow.focus).toHaveBeenCalled()
     expect(mockContentWindow.print).toHaveBeenCalled()
@@ -2337,6 +2347,7 @@ describe('DocumentDetailComponent', () => {
           mockIframe.onload(new Event('load'))
         }
 
+        tick()
         tick(200)
 
         if (expectToast) {