## FoamTree with custom tooltips

Using the `onGroupHover` event listener you can integrate FoamTree with your favourite tooltip library and show richer details about each group. Hold your mouse pointer over some group for a while to see the tooltip.

#### What's in the code?

- A simple utility for tracking mouse position and showing or hiding the tooltip.
- Using `onGroupHover` to get information about the group being hovered over.
- Setting `maxLabelSizeForTitleBar` to `0` to disable the default title bar.

See also the context menu example.