Why i can not create container from nodes

Question

i use bellow code but it is not active correct:diagramData.nodes[i].children.push(diagramData.nodes[counti].id);

Arunkumar Manoharan · Answer

Hi jacmd,Can you confirm us whether you are creating a group node at
runtime? If yes, we suggest you to create a group by using diagram.add method.
For more info, please refer to the below code snippet and sample link below.Code snippet:

let group:
  NodeModel = {
      id: 'group2',
      children: ['rectangle1', 'rectangle2']
      };
   
  diagram.add(group);

Sample
Link: https://stackblitz.com/edit/ijhiva-mzqrcr?file=index.tsAnd to know more about the group we have attached the UG-Documentation link.UG Link: https://ej2.syncfusion.com/documentation/diagram/group/Regards,Arun Kumar.