When Sololearn will update Javascript to ES6?

Question

I was studying Javascript and I look that here is var instead let and const... And then I thought: when will update to ES6?

Answer 1

Tell to Sololearn:
[e-mail]

Answer 2

Thanks!
I'll send an email

Answer 3

what is current edition of javascript on sololearn?
is it ES4?

Answer 4

they've still not updated