Which version of JavaScript/ECMAScript does freecodecamp teach?

[ArielLeslie]

There will be ES6 challenges in the new curriculum when it goes live. The current curriculum doesn’t include any features which are new to ES6.

Is there EcmaScript 6?

Hello FreeCodeCamp Community, Im currently doing the challenges related to the front end developement (javascript). But I was wondering is there challenges related to arrow(lambda) function or promises or const/var… the new additions to JS I mean. Thank you for the help!