I have seen https://www.amcharts.com/docs/v4/concepts/event-listeners/ and https://www.amcharts.com/docs/v4/reference/categoryaxis/#Events
categoryAxis.events.on('hit', function (ev) {
console.log('clicked on ', ev.target)
}, this)
works. However, this returns the complete CategoryAxis. I would like to distinguish on which catgeory the user clicked.
e.g. categoryAxis.category.template.events.on('hit', function (ev) does not exist.
You need to add the hit event listener on the axis renderer's label template in order to capture the category label that was clicked: