RectifyDOM.js

// https://vuejs.org/v2/guide/components.html#DOM-Template-Parsing-Caveats

const originalRender = ReactDOM.render
const components = { }

function renderElement (e, i) {
  return e.tagName
    ? React.createElement(
        components[e.localName] || e.localName,
        Array.from(e.attributes).reduce((r, n) => { r[n.localName] = eval(n.nodeValue); return r; }, { key: i }),
        ...renderChildNodes(e)
      )
    : e.textContent
}

function renderChildNodes (element) {
  return Array.from(element.childNodes).map(renderElement)
}

ReactDOM.render = (component, domNode) => {
  return domNode
    ? originalRender(component, domNode)
    : (domNode = component) && originalRender(renderChildNodes(domNode), domNode)
}