Display another value in the tooltip of a D3 chart

I was doing a preview and needed to display a different value on the tooltip that it displays. The view is entirely based on this template: link , and displays the values for each bar. I wanted to check if there is a possibility to display the label name of each value (in the example, it would be the name of each fruit), but I do not understand much of D3 / javascript and all the attempts I made were frustrated. Could someone give me a light?