Dispatcher.js

    if (this._interceptor == null || !this._interceptor(action)) {
      mark(action.type);
      this._currentDispatchActionType = action.type;
      try {
        const actionHandlers =
          this._orderedActionHandlers[action.type] || this._computeOrderedActionHandlers(action.type);
        for (let i = 0, l = actionHandlers.length; i < l; i++) {
          const {actionHandler, storeDidChange} = actionHandlers[i];
          if (actionHandler(action) !== false) {
            storeDidChange(action);
          }
        }
        Store.emitChanges();
        // Possible fix for FF dirty dispatch exceptions
        // Assumption is that FF is maybe executing a finally block after a setTimeout(0)???
        this._currentDispatchActionType = null;
      } catch (e) {
        console.warn('Dispatch Error', e);
      } finally {
        this._currentDispatchActionType = null;
      }