D3 Zoomable Circle Packing with Label Line-Wrap

D3 Zoomable Circle Packing Modified

// https://observablehq.com/@d3/zoomable-circle-packing



// Zoomable Circle Packing lack of line wrapping in Labels.
// With the help of https://bl.ocks.org/mbostock/7555321
// Now it has line wrapping.

// ----------------------------- After the zoom call -----------------------
  function wrap(text, width) {
  text.each(function() {
    var text = d3.select(this),
        words = text.text().split(/\s+/).reverse(),
        word,
        wordCount = 0,
        line = [],
        lineNumber = 0,
        lineHeight = 1.1, // ems
        y = text.attr("y") !== null ? text.attr('y') : 0,
        dy = text.attr("dy") !== null ? parseFloat(text.attr("dy")) : 0,
        tspan = text.text(null).append("tspan").attr("x", 0).attr("y", y).attr("dy", dy + "em");
      console.info(text.attr("y"));
    while (word = words.pop()) {
      line.push(word);
      tspan.text(line.join(" "));
      if (wordCount++ >= width) {
        line.pop();
        tspan.text(line.join(" "));
        line = [word];
        tspan = text.append("tspan").attr("x", 0).attr("y", y).attr("dy", ++lineNumber * lineHeight + dy + "em").text(word);
        wordCount = 0;
      }
    }
  });
}
  
svg.selectAll('text').call(wrap, 2);
// ------------------------------------------------------------------------------------------------