Ask HN: Composition vs. Inherance in ES6

Which one do you prefer to use?

According to some SO question composition is much more favoured (not linked to ES6).

But I heard developers thinking that is a very important question for ES6, and that composition would be prefered.

I totally miss the point of this question? I don't see why. (First my background is years in java so I'm thinking in a inherance way all the time)