draftjs.js

import React from 'react';
import ReactDOM from 'react-dom';
import {Editor, EditorState} from 'draft-js';

class App extends React.Component {
  state = {
    editorState: EditorState.createEmpty()
  }

  onChange = editorState => this.setState({editorState})

  render() {
    return (
        <Editor editorState={this.state.editorState} onChange={this.onChange} />
    );
  }
}

ReactDOM.render(
  <App />,
  document.getElementById('container')
);