React.renderComponentToStringAndCSS

renderComponentToStringAndCSS.js

var MyComponent = React.createComponent({
  render () {
    return <div style={{ color: 'blue' }}>Hello World</div>;
});

var page = React.renderComponentToStringAndCSS(MyComponent);

// value of page:
page = {
  html: '<div className="__a" data-reactid=".abc" data-react-checksum="123" data-react-classname="__a">Hello World</div>',
  css: {
    __a: 'color:blue;'
  }
};