Index: node_modules/d3-transition/src/transition/index.js
===================================================================
--- node_modules/d3-transition/src/transition/index.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
+++ node_modules/d3-transition/src/transition/index.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
@@ -0,0 +1,73 @@
+import {selection} from "d3-selection";
+import transition_attr from "./attr.js";
+import transition_attrTween from "./attrTween.js";
+import transition_delay from "./delay.js";
+import transition_duration from "./duration.js";
+import transition_ease from "./ease.js";
+import transition_easeVarying from "./easeVarying.js";
+import transition_filter from "./filter.js";
+import transition_merge from "./merge.js";
+import transition_on from "./on.js";
+import transition_remove from "./remove.js";
+import transition_select from "./select.js";
+import transition_selectAll from "./selectAll.js";
+import transition_selection from "./selection.js";
+import transition_style from "./style.js";
+import transition_styleTween from "./styleTween.js";
+import transition_text from "./text.js";
+import transition_textTween from "./textTween.js";
+import transition_transition from "./transition.js";
+import transition_tween from "./tween.js";
+import transition_end from "./end.js";
+
+var id = 0;
+
+export function Transition(groups, parents, name, id) {
+  this._groups = groups;
+  this._parents = parents;
+  this._name = name;
+  this._id = id;
+}
+
+export default function transition(name) {
+  return selection().transition(name);
+}
+
+export function newId() {
+  return ++id;
+}
+
+var selection_prototype = selection.prototype;
+
+Transition.prototype = transition.prototype = {
+  constructor: Transition,
+  select: transition_select,
+  selectAll: transition_selectAll,
+  selectChild: selection_prototype.selectChild,
+  selectChildren: selection_prototype.selectChildren,
+  filter: transition_filter,
+  merge: transition_merge,
+  selection: transition_selection,
+  transition: transition_transition,
+  call: selection_prototype.call,
+  nodes: selection_prototype.nodes,
+  node: selection_prototype.node,
+  size: selection_prototype.size,
+  empty: selection_prototype.empty,
+  each: selection_prototype.each,
+  on: transition_on,
+  attr: transition_attr,
+  attrTween: transition_attrTween,
+  style: transition_style,
+  styleTween: transition_styleTween,
+  text: transition_text,
+  textTween: transition_textTween,
+  remove: transition_remove,
+  tween: transition_tween,
+  delay: transition_delay,
+  duration: transition_duration,
+  ease: transition_ease,
+  easeVarying: transition_easeVarying,
+  end: transition_end,
+  [Symbol.iterator]: selection_prototype[Symbol.iterator]
+};