fix(MigrateState): add check

Rule-34 · Sep 30, 2022 · 5d62ee4 · 5d62ee4
1 parent ec8c450
commit 5d62ee4
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/assets/js/MigrateState.js b/assets/js/MigrateState.js
@@ -8,6 +8,10 @@
 export function migrateState(state) {
   const INITIAL_STATE_VERSION = state.version
 
+  if (INITIAL_STATE_VERSION == null) {
+    throw new Error('Invalid initial state version')
+  }
+
   switch (INITIAL_STATE_VERSION) {
     case 0:
       state = migrateVersion0State(state)