The option of 'navigationButtons' might not be working correctly.

[hmiyakoshi0803]

Hi
Thank you for useful library.
I'm currently trying to render network diagram in my react Apps using your library.

I'd like to use navigationButton in diagram, and I've already set below options, but it doesn't working for me.

If you have some advice, i'd really appreciate it.

const options = {
 interaction: {
    dragView: false,
    navigationButtons: true,
    tooltipDelay: 300,
    zoomView: false
  }
}