Restore Tree state after reload

[chuckn0rris]

Need an option to restore expanded state of tree nodes after data reload/ tab reopen. Forum post

Hi Team , I am trying to drag my subItem(child) , my endDate changes and automatically all my parent needs to be refresh . I am using project.load() to update my activities (refersh).But my gantt view is getting collapsed.

 
  
   this._gantt.project.load()
 
 

what could be the alternative to update tasks without collapsing (refresh) maintaining the expanded view of tree. In Below attachment Before I drag activity ebd date was 11 Julu , Once I drag it to 13 July . My tree got collapsed