dash: throw error from useDashState if context invalid (#1686)

82167673 · Daniel Hochman · GitHub · 6963b7ad · 82167673
Unverified Commit 82167673 authored 3 years ago by Daniel Hochman Committed by GitHub 3 years ago
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with 8 additions and 2 deletions
+8 -2
--- a/frontend/workflows/projectSelector/src/dash-hooks.tsx
+++ b/frontend/workflows/projectSelector/src/dash-hooks.tsx
@@ -22,6 +22,12 @@ export const useDashUpdater = (): useDashUpdaterReturn => {
  };
 };

-export const useDashState = (): DashState | undefined => {
-  return React.useContext<DashState | undefined>(DashStateContext);
+export const useDashState = (): DashState => {
+  const value = React.useContext<DashState | undefined>(DashStateContext);
+  if (!value) {
+    throw new Error(
+      "useDashState was invoked outside of a valid context, check that it is a child of the Dash component"
+    );
+  }
+  return value;
 };