Don't try to use an undefined transition list

3 months ago · fc555efbc0
parent b4e06d05c5
commit fc555efbc0
1 changed files with 3 additions and 1 deletions
--- a/src/fsm.js
+++ b/src/fsm.js
@ -95,7 +95,9 @@ export function openAutomaton(name, states, editable = false) {
    for (const s of state) {
      if (s in states) {
        const transitions = states[s].transitions[letter];
-        newStates.push(...transitions);
+        if (transitions) {
+          newStates.push(...transitions);
+        }
      }
    }
    state = newStates;