From e48943ec18215833098e42de9bd4cb3fef98e5a6 Mon Sep 17 00:00:00 2001
From: Matt Huntington <matt.huntington@gmail.com>
Date: Tue, 19 Sep 2017 17:21:33 -0400
Subject: [PATCH] Update data after a drag

---
 BUILD.md | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/BUILD.md b/BUILD.md
index 8ab2bfc..de5386a 100644
--- a/BUILD.md
+++ b/BUILD.md
@@ -609,3 +609,11 @@ var dragBehavior = d3.drag()
     .on('drag', drag)
     .on('end', dragEnd);
 ```
+
+Let's change the color of a circle while it's being dragged too:
+
+```css
+circle:active {
+    fill: red;
+}
+```