From fcb2c3df584a00e695a5c66cb41a2db28997f5e0 Mon Sep 17 00:00:00 2001
From: Tom MacWright <tom@macwright.org>
Date: Tue, 6 Sep 2016 11:02:13 -0400
Subject: [PATCH] Fix points layer

---
 modules/svg/points.js | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/modules/svg/points.js b/modules/svg/points.js
index dfe67c00d..43a2b75af 100644
--- a/modules/svg/points.js
+++ b/modules/svg/points.js
@@ -22,7 +22,13 @@ export function Points(projection, context) {
 
         points.sort(sortY);
 
-        var groups = surface.selectAll('.layer-hit').selectAll('g.point')
+        var layer = surface.selectAll('.layer-hit')
+            .data([0]);
+
+        layer = layer.enter().append('g').attr('class', 'layer-hit')
+            .merge(layer);
+
+        var groups = layer.selectAll('g.point')
             .filter(filter)
             .data(points, Entity.key);