From 70c9774a5d4c2e7f586dc876cb3d83bf94310320 Mon Sep 17 00:00:00 2001
From: James Long <longster@gmail.com>
Date: Fri, 13 Apr 2018 14:33:42 -0400
Subject: [PATCH] Add note about snapshot diffing

---
 README.md | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/README.md b/README.md
index 297ce6f6..46c31ab0 100644
--- a/README.md
+++ b/README.md
@@ -687,6 +687,27 @@ react components.
 
 </details>
 
+<details>
+
+<summary>Why isn't snapshot diffing working?</summary>
+
+If you use the
+[snapshot-diff](https://github.com/jest-community/snapshot-diff)
+library to save snapshot diffs, it won't work out of the box because
+this library uses the DOM which is mutable. Changes don't return new
+objects so snapshot-diff will think it's the same object and avoid diffing it.
+
+Luckily there's an easy to way to make it work: clone the DOM when
+passing it into snapshot-diff. It looks like this:
+
+```js
+const firstVersion = container.cloneNode(true);
+// Do some changes
+snapshotDiff(firstVersion, container.cloneNode(true));
+```
+
+</details>
+
 ## Other Solutions
 
 In preparing this project,