My code from https://news.ycombinator.com/item?id=7426312 but in a sane format

gistfile1.js

/* @jsx m.dom */

function m(type, props, children) {
  // assuming m() looks something like this.
  return {
    type: type,
    props: props,
    children: children
  };
}
m.render = function(lwDOM){
  console.log(lwDOM)
};
m.dom = {};

// React hard codes this array so we can do something like this to build the mapping
['a', 'span'].forEach((el) => {
  m.dom[el] = function(props, ...args) { return m.call(null, el, props, args); }
});

m.render(
  <a href={"google.com"}>
    <span>hello</span>
    <span>world</span>
  </a>
);