Google Bubble Chart custom tooltip column does not render
问题 I am trying to add a custom tooltip to a Bubble chart, to replace the default tooltip. I have followed the instructions from the docs site (here) to add a new string column to the DataTable, with role: 'tooltip' . However, you can see in the following JS fiddle example, that the custom tooltip content does not render. The chart still shows the default tooltip. Anyone know what I still need to do to get this custom tooltip content to show up? http://jsfiddle.net/MPBmY/2/ 回答1: I ended up making