Add check for undefined header in Column resizer (#1156)

iTwin · May 10, 2023 · 70043c3 · 70043c3
1 parent 267a7a4
commit 70043c3
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diff --git a/.changeset/hip-suns-repeat.md b/.changeset/hip-suns-repeat.md
@@ -0,0 +1,5 @@
+---
+'@itwin/itwinui-react': patch
+---
+
+Fixes an issue where table crashes when resizing the Column Manager column in expand mode.
diff --git a/packages/itwinui-react/src/core/Table/hooks/useResizeColumns.tsx b/packages/itwinui-react/src/core/Table/hooks/useResizeColumns.tsx
@@ -494,6 +494,9 @@ function getLeafHeaders(header: HeaderGroup) {
 const getHeaderWidth = <T extends Record<string, unknown>>(
   header: ColumnInstance<T>,
 ) => {
+  if (!header) {
+    return 0;
+  }
   return Number(header.width || header.resizeWidth || 0);
 };