Creating a new BroadcastEventListener throws error

[RyanHayden]

Following the example using version 6.0.0 I am receiving an error when creating a new BroadcastEventListener. (Using listenFor on the SignalRConnection throws the same error because it is also creating and returning a BroadcastEventListener)

error:

Interesting enough, if I copy the class from the GitHub source code and add it into my project manually, the code then works.

[jpenc]

You're probably targeting es6 or es2015 but this code only works with es5. Unfortunately I have to stick with es2015 due to some other dependencies so this is a show stopper for me as well. If you can, target es5 instead.

Any plans to get this to es2015 compatibility level in the near future?

[carol-braileanu]

Getting the same error using Angular 8. Any way to fix this?