- for (var i = callback_plugin_pairs.length - 1; i >= 0; i--) {
- var plugin = callback_plugin_pairs[i][0];
- var callback = callback_plugin_pairs[i][1];
- callback.call(plugin, e);
- if (e.propagationStopped) break;
+ if (callback_plugin_pairs) {
+ for (var i = callback_plugin_pairs.length - 1; i >= 0; i--) {
+ var plugin = callback_plugin_pairs[i][0];
+ var callback = callback_plugin_pairs[i][1];
+ callback.call(plugin, e);
+ if (e.propagationStopped) break;
+ }