I believe you are talking about this hyperscript: https://hyperscript.org/

Whereas the parent post is talking about: https://github.com/hyperhype/hyperscript

Unfortunately, the creator of https://hyperscript.org/ hijacked the name even when the term "hyperscript" is still used to refer to dominictarr's project and the `h('p', 'hello world') API of declaring templates in JavaScript (as seen in React, Preact, Mithril, etc.).