From edc598e62a97b4858ecbc8cf4e2b72add8e366fb Mon Sep 17 00:00:00 2001
From: Brian Vaughn <bvaughn@fb.com>
Date: Tue, 9 Apr 2019 11:43:49 -0700
Subject: [PATCH] Fixed Tree minWidth initial case to fill 100% width

---
 src/devtools/views/Components/Tree.js | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/src/devtools/views/Components/Tree.js b/src/devtools/views/Components/Tree.js
index 5bb94c77f7..b97ff5a9cf 100644
--- a/src/devtools/views/Components/Tree.js
+++ b/src/devtools/views/Components/Tree.js
@@ -198,12 +198,15 @@ function InnerElementType({ style, ...rest }) {
   // We shouldn't retain this width across different conceptual trees though,
   // so when the user opens the "owners tree" view, we should discard the previous width.
   const divRef = useRef<HTMLDivElement | null>(null);
-  const minWidthRef = useRef<number>(parseInt(style.width, 10));
-  const minWidth = ownerStack.length > 0 ? '100%' : minWidthRef.current;
+  const minWidthRef = useRef<number | null>(null);
+  const minWidth =
+    ownerStack.length > 0 || minWidthRef.current === null
+      ? '100%'
+      : minWidthRef.current;
   useEffect(() => {
     if (divRef.current !== null) {
       minWidthRef.current = Math.max(
-        minWidthRef.current,
+        minWidthRef.current || 0,
         divRef.current.offsetWidth
       );
     }