 .innerRadius(100)         // This is the size of the donut hole
    .outerRadius(radius)
  )
  .attr('fill', function(d){ return(color(d.data.key)) })
  .attr("stroke", "black")
  .style("stroke-width", "2px")
  .style("opacity", 0.7)

</script></xmp></code></pre>
            <!-- ==================================== -->

            <!-- ========= show JS code v6 ==============  -->
            <pre
              class="language-js d-none d3v6-chunk"
            ><code id="code-js-v6" contenteditable="tru