First commit.

Signed-off-by: Chen Xiao <abigwc@gmail.com>

client/node_modules/d3-selection/src/pointers.js

@@ -0,0 +1,11 @@
+import pointer from "./pointer.js";
+import sourceEvent from "./sourceEvent.js";
+
+export default function(events, node) {
+  if (events.target) { // i.e., instanceof Event, not TouchList or iterable
+    events = sourceEvent(events);
+    if (node === undefined) node = events.currentTarget;
+    events = events.touches || [events];
+  }
+  return Array.from(events, event => pointer(event, node));
+}