options._diff not called for implicit Fragments

[marvinhagemeister]

import { render, h,options, Fragment}  from "preact"
import renderToString from "preact-render-to-string"

const oldDiff = options.__b;
options.__b = (vnode) => {
  if (vnode.type === Fragment) {
    console.log(vnode.type === Fragment ? vnode.props:null)
  }
  if (oldDiff) oldDiff(vnode)
}

function App() {
  return <div>
    <h1>test</h1>
    {[
      <p key="1">1</p>,
      <p key="2">2</p>,
      <p key="3">3</p>,
    ]}
  </div>
}

const app = document.getElementById("app");
render(<App />, app)

console.log("=====")

// Fragments not visible in options._diff with RTS
renderToString(<App />);

[JoviDeCroock]

Hmmm, most likely because we do this different compared to Preact diffing, in RTS we just go over the Array, child by child while in Preact we stub in a new element

[marvinhagemeister]

Yeah, admittedly my use case is pretty esoteric. I doubt the current behavior leads to problems. Need to put some more thought into it, as there might be a way to work around it.