Index: node_modules/d3-hierarchy/src/partition.js
===================================================================
--- node_modules/d3-hierarchy/src/partition.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
+++ node_modules/d3-hierarchy/src/partition.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
@@ -0,0 +1,52 @@
+import roundNode from "./treemap/round.js";
+import treemapDice from "./treemap/dice.js";
+
+export default function() {
+  var dx = 1,
+      dy = 1,
+      padding = 0,
+      round = false;
+
+  function partition(root) {
+    var n = root.height + 1;
+    root.x0 =
+    root.y0 = padding;
+    root.x1 = dx;
+    root.y1 = dy / n;
+    root.eachBefore(positionNode(dy, n));
+    if (round) root.eachBefore(roundNode);
+    return root;
+  }
+
+  function positionNode(dy, n) {
+    return function(node) {
+      if (node.children) {
+        treemapDice(node, node.x0, dy * (node.depth + 1) / n, node.x1, dy * (node.depth + 2) / n);
+      }
+      var x0 = node.x0,
+          y0 = node.y0,
+          x1 = node.x1 - padding,
+          y1 = node.y1 - padding;
+      if (x1 < x0) x0 = x1 = (x0 + x1) / 2;
+      if (y1 < y0) y0 = y1 = (y0 + y1) / 2;
+      node.x0 = x0;
+      node.y0 = y0;
+      node.x1 = x1;
+      node.y1 = y1;
+    };
+  }
+
+  partition.round = function(x) {
+    return arguments.length ? (round = !!x, partition) : round;
+  };
+
+  partition.size = function(x) {
+    return arguments.length ? (dx = +x[0], dy = +x[1], partition) : [dx, dy];
+  };
+
+  partition.padding = function(x) {
+    return arguments.length ? (padding = +x, partition) : padding;
+  };
+
+  return partition;
+}