preact 8 to 10 polyfill.md

Temporarily bring back legacy VNode properties

Usage: just import the code from somewhere.

import './upgrade-polyfill';

upgrade-polyfill.js

import { options } from 'preact';

const EMPTY = [];

let old = options.vnode;
options.vnode = vnode => {
  vnode.attributes = vnode.props;
  vnode.nodeName = vnode.type;
  vnode.children = vnode.props && vnode.props.children || EMPTY;
  if (old) old(vnode);  
};