How to expand PrimeNg TreeTable by code

Question

Assuming I have a TreeTable provided by PrimeNg for Angular2. How can I expand a particular node in code (for example in onNodeSelect callback)?

Answer 1

I guess the OP no longer needs the answer, but for anyone who reaches here and finds no answer -

There is a property expanded for TreeNode, all you need to do is just set it to true

selectedNode.expanded=true;

And if you want the tree to be shown all expanded, just traverse the TreeNodes and set expanded on each. Which will be something similar to this

  expandChildren(node:TreeNode){
    if(node.children){
      node.expanded=true;
      for(let cn of node.children){
        this.expandChildren(cn);
      }
    }
  }