From 3ae1e5b786ec27cdea1622cfb62a4541329f13d5 Mon Sep 17 00:00:00 2001
From: Nicolas Gallagher <nicolasgallagher@gmail.com>
Date: Thu, 9 Mar 2017 18:13:00 -0800
Subject: [PATCH] [fix] don't run 'modality' without a DOM

Fix #387
---
 src/modules/modality/index.js | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/modules/modality/index.js b/src/modules/modality/index.js
index e7f9a10d..247daefb 100644
--- a/src/modules/modality/index.js
+++ b/src/modules/modality/index.js
@@ -1,5 +1,7 @@
 /* global document, window */
 
+import { canUseDOM } from 'fbjs/lib/ExecutionEnvironment';
+
 /**
  * Adapts focus styles based on the user's active input modality (i.e., how
  * they are interacting with the UI right now).
@@ -16,6 +18,10 @@
  * Based on https://github.com/WICG/modality
  */
 const modality = () => {
+  if (!canUseDOM) {
+    return;
+  }
+
   /**
    * Determine whether the keyboard is required when an element is focused
    */