How to set "PanelExpanderButton" collapsed initially?

GoJS
1

Hi, I am trying to use GoJS in hackathon. It’s really helpful!

But I am wondering how I can set “panelExpanderButton” part collapsed initially. All samples I have seen are expanded initially.

Thanks in advance!!

2

Set the “COLLAPSIBLE” GraphObject’s GraphObject.visible property to false:

    {
      name: "COLLAPSIBLE",
      visible: false,
      . . .
    }