So siehts ganz gut aus !

node_modules/core-js/modules/es7.promise.try.js

@@ -0,0 +1,12 @@
+'use strict';
+// https://github.com/tc39/proposal-promise-try
+var $export = require('./_export');
+var newPromiseCapability = require('./_new-promise-capability');
+var perform = require('./_perform');
+
+$export($export.S, 'Promise', { 'try': function (callbackfn) {
+  var promiseCapability = newPromiseCapability.f(this);
+  var result = perform(callbackfn);
+  (result.e ? promiseCapability.reject : promiseCapability.resolve)(result.v);
+  return promiseCapability.promise;
+} });