EditorCore_setup.js

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

export default class EditorCore extends React.Component {
  constructor(props) {
    super(props);
    this.state = { editorState: EditorState.createEmpty() };
    this.onChange = this._onChange.bind(this);
  }
  _onChange(editorState) {
    this.setState({ editorState });
  }
  render() {
    const { editorState } = this.state;
    return (<div className="MediumEditor-root">
      <Editor
        placeholder="Tell your story..."
        editorState={editorState}
        onChange={this.onChange}
    />
    </div>);
  }
}