Go.js Copy Paste Tree not work

[walter]

First, do you know about the CommandHandler.copiesTree property? Setting this to true may be sufficient for your purposes.

CommandHandler | GoJS API

  $(go.Diagram, ...,
    { ...,
      "commandHandler.copiesTree": true
    })

The CommandHandler.copiesParentKey might also be useful if you are working with a TreeModel and want the copied subtree to be added to the current parent.

Second, if you want to copy nodes and links programmatically, you can call Node.findTreeParts and Diagram.copyParts.

Node | GoJS API

Diagram | GoJS API

Third, there’s no point in posting in StackOverflow, this forum, and sending us email all at once.