在d3动态饼图上添加动态标签

Question

I use D3.js to create a dynamic pie chart. I want the user can chose what informations he wants to display. So I want labels can appears an disappears. (for the moment it's random choice but in future the user can chose particular part of the pie)

I want to display "age" value on the pie (show this JsFiddle ).

If I tried to append text or create "g" group it doesn't works, the pie chart doesn't stay dynamics ... I think I must use var g = svg.selectAll("path").enter().append("g") somewhere to create group and add text label and path in, but I fail to understand how to do that.

Sorry for my poor english

Thanks for your help

Answer 1

You weren't adding the text element back into the chart on change. I've fixed this here .