You need to manually add a tooltip if you want one! React-vis tries not to make assumptions about how you will be using it, it just tries to offers a flexible platform. You can see an example of how to do this here: https://github.com/uber/react-vis/blob/master/showcase/sunbursts/sunburst-with-tooltips.js but I can give a quick example here as well:
<Sunburst
hideRootNode
colorType="literal"
data={data}
height={300}
width={350}>
<Hint value={hoveredValue} />
</Sunburst>
Where hoveredValues is an appropriate hover value (perhaps garnered from a hover listener on the sunburst it self). You may need to modify the value you get from you on hover method
function buildValue(hoveredCell) {
const {radius, angle, angle0} = hoveredCell;
const truedAngle = (angle + angle0) / 2;
return {
x: radius * Math.cos(truedAngle),
y: radius * Math.sin(truedAngle)
};
}
I've opened a PR to add the content of this answer to the sunburst documentation (#552), which I hope helps.