You may be wondering, what does that h do? What does it stand for? The h stands for hyperscript. It’s a riff of HTML, which means Hypertext Markup Language: since we’re dealing with a script, it’s become convention in virtual DOM implementations to use this substitution. This definition is also addressed in the documentation of other frameworks as well. Here it is, for example, in Cycle.js.
The name hyperscript may potentially be confusing to some people, given the fact that hyperscript is actually the name of a library (what isn’t updated these days) and it actually has a small ecosystem. In this case, we’re not talking about that particular implementation.
Hope that clears things up for those who are curious!