I tried to adapt the Tooltip user handler example from JavaScript ROOT API examples for a TGraph, by changing createHistogram to createTGraph and providing the arrays needed. The webpage displays the graph without logging any errors. When I move the mouse over the graph point, the tooltip displays. When I click on a point, the user tooltip handler does not seem to activate, the user_tooltip div shows ‘No info’.
Should the UserClickHandler work for a TGraph? I saw it work perfectly for TH2D.