Merge pull request #185 from Betree/fix/184-undefined-window

Check for undefined window to support SSR
bvaughn · Mar 18, 2019 · 488db17 · 488db17
2 parents 53c26b4 + c29625e
commit 488db17
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Showing 2 changed files with 2 additions and 2 deletions.
diff --git a/src/createGridComponent.js b/src/createGridComponent.js
@@ -132,7 +132,7 @@ const defaultItemKey = ({ columnIndex, data, rowIndex }) =>
 let devWarningsOverscanCount = null;
 let devWarningsTagName = null;
 if (process.env.NODE_ENV !== 'production') {
-  if (typeof window.WeakSet !== 'undefined') {
+  if (typeof window !== 'undefined' && typeof window.WeakSet !== 'undefined') {
     devWarningsOverscanCount = new WeakSet();
     devWarningsTagName = new WeakSet();
   }

diff --git a/src/createListComponent.js b/src/createListComponent.js
@@ -112,7 +112,7 @@ const defaultItemKey = (index: number, data: any) => index;
 let devWarningsDirection = null;
 let devWarningsTagName = null;
 if (process.env.NODE_ENV !== 'production') {
-  if (typeof window.WeakSet !== 'undefined') {
+  if (typeof window !== 'undefined' && typeof window.WeakSet !== 'undefined') {
     devWarningsDirection = new WeakSet();
     devWarningsTagName = new WeakSet();
   }