If you're hoping to use native V8 Promises, beware using them with other promise libraries / custom thenables because of https://code.google.com/p/v8/issues/det

If you're hoping to use native V8 Promises, beware using them with other promise libraries / custom thenables because of https://code.google.com/p/v8/issues/detail?id=4162 https://code.google.com/p/v8/issues/detail?id=4162 (more detail and test case in https://github.com/zloirock/core-js/issues/78 https://github.com/zloirock/core-js/issues/78 )