From ac7684b87bdbf7c1344fc02850bb765e76d17627 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=A9r=C3=B4me=20Steunou?= <jerome.steunou@klaxoon.com>
Date: Fri, 14 Sep 2018 16:18:26 +0200
Subject: [PATCH] Fix some iframe edge cases

Should fix #13648 by fallback on `window` when `document.defaultView` does not exists anymore
---
 packages/react-dom/src/client/ReactDOMSelection.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/react-dom/src/client/ReactDOMSelection.js b/packages/react-dom/src/client/ReactDOMSelection.js
index 00181336a6053..9f247af15b4f5 100644
--- a/packages/react-dom/src/client/ReactDOMSelection.js
+++ b/packages/react-dom/src/client/ReactDOMSelection.js
@@ -152,7 +152,7 @@ export function getModernOffsetsFromPoints(
  */
 export function setOffsets(node, offsets) {
   const doc = node.ownerDocument || document;
-  const win = doc ? doc.defaultView : window;
+  const win = (doc && doc.defaultView) || window;
   const selection = win.getSelection();
   const length = node.textContent.length;
   let start = Math.min(offsets.start, length);