identify center node / circle and make it always fill with transparent color about sunburst-chart

[vasturiano]

@githubdd7 you can keep track of when the chart changes focus, by attaching a listener to the .onClick(node => ...) event. You can also extract the current node in focus simply by calling .focusOnNode() without any arguments.

If you know the node that is currently in focus, you know that the node in the center is its parent, which you can access by doing node.__dataNode.parent.data (if node.__dataNode.parent is null you're at the top level).

Once you know which node is at the center, you can style it selectively whichever way you wish by calling the usual accessor methods like .color(node => ...) or .label(node => ...).

[githubdd7]

Thank You @vasturiano