[JimDabell]

> this blog post and subsequent discussion is literally just about horizontal centring!

It’s not. Did you read past the first example? It goes into vertical centring from “Centring with flexbox” onwards.

[hnlmorg]

ok, half the article and most of the HN discussion is about horizontal centering. Either way, the point is still valid regardless of what percentage of the article was focused on something that should be trivially discoverable to even the casual web developer.