Can flexbox and let be used in 2018?

Question

JavaScript

I use vanilla flexbox without crutches, and let instead of var
I want to be cross-platform.
Question - which IEs support flexbox and let?
Can you be sure that this works in IE11?
Or just starting with Edge?
What proportion of Runet users will be in flight if you do not support IE?

Answer 1

let - none ie
flex - fully none ie
Can flexbox and let be used in 2018?
Yes

Answer 2

What proportion of Runet users will be in flight?

What's wrong with seeing support?
let: https://developer.mozilla.org/en/docs/Web/JavaScri...
flex: https://caniuse.com/#search=flex

Answer 3

IE11 supports flexbox just fine. If you're using babel, you can use modern js syntax to your heart's content.

Answer 4

Hello, bro, I think that not only is it possible, but it is also necessary to use new features in the yard in 2018, babel polyfills and auto-prefix, if you really need to achieve a cross, they will help, as for IE, they are already a thing of the past, I think for another six months at most a year and everyone will forget about it irrevocably if you haven't already done so!!