From c8139317ee6e2ad7bf4b9c52e3d7699ec24ee5d5 Mon Sep 17 00:00:00 2001
From: Sebastian McKenzie <sebmck@gmail.com>
Date: Mon, 3 Nov 2014 13:09:36 +1100
Subject: [PATCH] add static property inherit warning for IE <= 9 to README -
 closes #116

---
 README.md | 21 +++++++++++++++++++--
 1 file changed, 19 insertions(+), 2 deletions(-)

diff --git a/README.md b/README.md
index b9dd9fd937..f74281f289 100644
--- a/README.md
+++ b/README.md
@@ -102,9 +102,9 @@ map embedded in a comment at the bottom.
 Compile the entire `src` directory and output it to the `lib` directory.
 
     $ 6to5 src --out-dir lib
-    
+
 Compile the entire `src` directory and output it to the one concatenated file.
-    
+
     $ 6to5 src --out-file script-compiled.js
 
 Pipe a file in via stdin and output it to `script-compiled.js`
@@ -283,6 +283,23 @@ If you're inheriting from a class then static properties are inherited from it
 via [\_\_proto\_\_](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/proto),
 this is widely supported but you may run into problems with much older browsers.
 
+**NOTE:** `__proto__` is not supported on IE <= 9 so static properties
+**will not** be inherited. A possible workaround is to use `super();`:
+
+```javascript
+class Foo {
+  static foo() {
+
+  }
+}
+
+class Bar extends Foo {
+  static foo() {
+    super();
+  }
+}
+```
+
 ### Generators
 
 The [regenerator runtime](https://github.com/facebook/regenerator/blob/master/runtime.js)