Unable to get plotly_clickannotation event fired

[sanghunjlee]

graphing-library-docs/_posts/plotly_js/fundamentals/annotations/2015-10-08-style-annotation-b.html

Line 86 in 2c363a7

.on('plotly_clickannotation', function(event, data) {

I've tried to follow this code to get the annotation to close when clicked on it. However, the event doesn't seem to get fired.
Per this documentation, I also tried setting captureevents to true. But it still doesn't get captured.