Index: node_modules/d3-drag/src/noevent.js
===================================================================
--- node_modules/d3-drag/src/noevent.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
+++ node_modules/d3-drag/src/noevent.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
@@ -0,0 +1,13 @@
+// These are typically used in conjunction with noevent to ensure that we can
+// preventDefault on the event.
+export const nonpassive = {passive: false};
+export const nonpassivecapture = {capture: true, passive: false};
+
+export function nopropagation(event) {
+  event.stopImmediatePropagation();
+}
+
+export default function(event) {
+  event.preventDefault();
+  event.stopImmediatePropagation();
+}