Treemap2

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<!DOCTYPE html>
<meta charset="utf-8">
<style>

#chart {
  width: 960px;
  height: 500px;
  background: #bbb;
}

text {
  pointer-events: none;
}

.grandparent text {
  font-weight: bold;
}

rect {
  fill: none;
  stroke: #fff;
}

rect.parent,
.grandparent rect {
  stroke-width: 2px;
}

.grandparent rect {
  fill: orange;
}

.grandparent:hover rect {
  fill: #ee9700;
}

.children rect.parent,
.grandparent rect {
  cursor: pointer;
}

rect.parent {
  pointer-events: all;
}

.children:hover rect.child {
  fill: #aaa;
}

</style>

<header>
  <aside>March, 07 2018</aside>
  
</header>

<h1>Plants treemap</h1>

<aside>Click any cell to zoom in, or the top orange label to zoom out.</aside>

var x = d3.scale.linear()
    .domain([0, width])
    .range([0, width]);

var y = d3.scale.linear()
    .domain([0, height])
    .range([0, height]);

var svg = d3.select("#chart").append("svg")
    .attr("width", width + margin.left + margin.right)
    .attr("height", height + margin.bottom + margin.top)
    .style("margin-left", -margin.left + "px")
    .style("margin.right", -margin.right + "px")
  .append("g")
    .attr("transform", "translate(" + margin.left + "," + margin.top + ")")
    .style("shape-rendering", "crispEdges");

var grandparent = svg.append("g")
    .attr("class", "grandparent");

grandparent.append("rect")
    .attr("y", -margin.top)
    .attr("width", width)
    .attr("height", margin.top);

grandparent.append("text")
    .attr("x", 6)
    .attr("y", 6 - margin.top)
    .attr("dy", ".75em");

d3.csv("nutriments.csv", function(nutriments) {

console.log("Before:");
console.log(nutriments);

initialize(root);
  accumulate(root);
  layout(root);
  display(root);

function initialize(root) {
    root.x = root.y = 0;
    root.dx = width;
    root.dy = height;
    root.depth = 0;
  }

// Aggregate the values for internal nodes. This is normally done by the
  // treemap layout, but not here because of our custom implementation.
  function accumulate(d) {
    //console.log(d.children);
    return d.values
        ? d.value = d.values.reduce(function(p, v) { return p + accumulate(v); }, 0)
        : +d.value;
  }

// Compute the treemap layout recursively such that each group of siblings
  // uses the same size (1×1) rather than the dimensions of the parent cell.
  // This optimizes the layout for the current zoom state. Note that a wrapper
  // object is created for the parent node for each group of siblings so that
  // the parent’s dimensions are not discarded as we recurse. Since each group
  // of sibling was laid out in 1×1, we must rescale to fit using absolute
  // coordinates. This lets us use a viewport to zoom.
  function layout(d) {
    if (d.values) {
      treemap.nodes({values: d.values});
      d.values.forEach(function(c) {
        c.x = d.x + c.x * d.dx;
        c.y = d.y + c.y * d.dy;
        c.dx *= d.dx;
        c.dy *= d.dy;
        c.parent = d;
        layout(c);
      });
    }
  }

function display(d) {
    grandparent
        .datum(d.parent)
        .on("click", transition)
      .select("text")
        .text(name(d));

var g1 = svg.insert("g", ".grandparent")
        .datum(d)
        .attr("class", "depth");

var g = g1.selectAll("g")
        .data(d.values)
      .enter().append("g");

g.filter(function(d) { return d.values; })
        .classed("children", true)
        .on("click", transition);

g.selectAll(".child")
        .data(function(d) { return d.values || [d]; })
      .enter().append("rect")
        .attr("class", "child")
        .call(rect);

g.append("rect")
        .attr("class", "parent")
        .call(rect)
      .append("title")
        .text(function(d) { return formatNumber(+d.value); });

g.append("text")
        .attr("dy", ".75em")
        .text(function(d) { return name(d); })
        .call(text);

function transition(d) {
      if (transitioning || !d) return;
      transitioning = true;

var g2 = display(d),
          t1 = g1.transition().duration(750),
          t2 = g2.transition().duration(750);

// Update the domain only after entering new elements.
      x.domain([d.x, d.x + d.dx]);
      y.domain([d.y, d.y + d.dy]);

// Enable anti-aliasing during the transition.
      svg.style("shape-rendering", null);

// Draw child nodes on top of parent nodes.
      svg.selectAll(".depth").sort(function(a, b) { return a.depth - b.depth; });

// Fade-in entering text.
      g2.selectAll("text").style("fill-opacity", 0);

// Transition to the new view.
      t1.selectAll("text").call(text).style("fill-opacity", 0);
      t2.selectAll("text").call(text).style("fill-opacity", 1);
      t1.selectAll("rect").call(rect);
      t2.selectAll("rect").call(rect);

// Remove the old node when the transition is finished.
      t1.remove().each("end", function() {
        svg.style("shape-rendering", "crispEdges");
        transitioning = false;
      });
    }

return g;
  }

function text(text) {
    text.attr("x", function(d) { return x(d.x) + 6; })
        .attr("y", function(d) { return y(d.y) + 6; });
  }

/*
  function name(d) {
    return d.parent
        ? name(d.parent) + "." + d.name
        : d.name;
  }
*/
  function name(d) {
    return d.parent
        ? name(d.parent) + "." + d.key
        : d.key;
  }

});

</script>

Modified http://d3js.org/d3.v3.js?2.9.1 to a secure url

https://d3js.org/d3.v3.js?2.9.1