React without JSX | LS

script.ls

window <<< React.DOM
console.log h1, 'h1'

# works properly
React.render(h1(null,'foo'), document.body)

Bar = React.createClass do
  render: -> h1 null, 'bar'
  
# !!!throws an error: Uncaught TypeError: Cannot read property '__reactAutoBindMap' of undefined 
# React.render(Bar(null), document.body)

# following would do well
React.render do
  React.createElement(Bar, null)
  document.body