Add extra check for undefined

gatsbyjs · Nov 13, 2017 · 1a42593 · 1a42593
1 parent 84bd995
commit 1a42593
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/packages/gatsby-react-router-scroll/src/StateStorage.js b/packages/gatsby-react-router-scroll/src/StateStorage.js
@@ -48,6 +48,6 @@ export default class SessionStorage {
   getStateKey(location, key) {
     const locationKey = location.key
     const stateKeyBase = `${STATE_KEY_PREFIX}${locationKey}`
-    return key === null ? stateKeyBase : `${stateKeyBase}|${key}`
+    return (key === null || typeof key === `undefined`) ? stateKeyBase : `${stateKeyBase}|${key}`
   }
 }