This is what I currently have:
<TooltipHost
content="Enter claim name in a way to be understandable for all parties."
directionalHint={DirectionalHint.rightCenter}
calloutProps={{ calloutMaxWidth: 100}}
>
<TextField />
</TooltipHost>
The tooltip is shown on hover. I want it to be exclusively shown on focus.
Is there a way to do it without controlling it with state?
The host automatically adds it to hover and focus. If you want focus only you'd need to use the Tooltip control itself and manually show it on focus.