Regarding TS Definition for Version 8.0.9

In the TS definition, the tooltipFor method of Tooltips requires the html parameter to return an HTMLElement type. When I return an HTMLElement type, the tooltip on the page fails to parse correctly into an HTML element and instead displays as “[object HTMLDivElement]”.

Hello,

Thank you for letting us know about that issue. I added the information about the tooltipFor method parameters to our internal bug tracker.
The dev team will fix that issue in the future, but I cannot give you any ETA.