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docs/dist/js/umd/modal.js

@@ -479,6 +479,9 @@
             }
 
             if (typeof config === 'string') {
+              if (data[config] === undefined) {
+                throw new Error('No method named "' + config + '"');
+              }
               data[config](relatedTarget);
             } else if (_config.show) {
               data.show(relatedTarget);