dididy commented on code in PR #5057:
URL: https://github.com/apache/zeppelin/pull/5057#discussion_r2319036058


##########
zeppelin-web-angular/src/app/pages/workspace/notebook/notebook.component.ts:
##########
@@ -142,15 +149,11 @@ export class NotebookComponent extends 
MessageListenersManager implements OnInit
       return;
     }
     const definedNote = this.note;
-    definedNote.paragraphs.splice(data.index, 0, data.paragraph).map(p => {
-      return {
-        ...p,
-        focus: p.id === data.paragraph.id
-      };
-    });
-    definedNote.paragraphs = [...definedNote.paragraphs];
+    definedNote.paragraphs.splice(data.index, 0, data.paragraph);
+    const paragraphIndex = definedNote.paragraphs.findIndex(p => p.id === 
data.paragraph.id);
+
     this.cdr.markForCheck();
-    // TODO(hsuanxyz) focus on paragraph
+    definedNote.paragraphs[paragraphIndex].focus = true;

Review Comment:
   0fd4510
   
   No, there wasn’t a specific reason. Since it worked regardless of the order 
with `markForCheck()`, I didn’t really consider it at first. However, given 
Angular’s characteristics, I thought it would be more appropriate to place it 
at the end, so I made the change.



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