How can I select the bar to let tooltip stay there, then select the
"click test" to show the more information?
if I add trigger:'selection' to the tooltip options, the tooltip disappeared even I click it.
I also tried <a href"#" onclick="info()"> click test </a> but not work.
and tried chart.setAction(){} function also, but still not working on timeline.
above two ways working well on Piechart but not on Timeline, it that the timeline limitation?