Uncaught ReferenceError: ReactDOM is not defined

Question

So i have Rails applications, i installed react-rails gem, set it up and try to run test application.

Freshly installed, when i tryed to run hello world program, this er

Answer 1

ReactDOM available since version 0.14.0, so you need to use React.render (because you have a React version 0.13.3) instead,

setInterval(function() {
  React.render(
    ,
    document.getElementById('example')
  );
}, 500);

or upgrade your React version and include ReactDOM

Changes in React 0.14