draftjs how to initiate an editor with content
<p>Stumbled on this cool text editor, <a href="https://draftjs.org/" rel="noreferrer">draft.js</a> by Facebook.
I tried to follow the example in Github, but I want to create an editor with content instead of an empty editor.</p>
<pre><code>var EditorState = Draft.EditorState;

var RichEditor = React.createClass({
   getInitialState(){
      return {editorState: EditorState.createWithContent(&quot;Hello&quot;)}
      //the example use this code to createEmpty editor
     // return ({editorState: EditorState.createEmpty()})
   }
});
</code></pre>
<p>When I run it, it throws an error with the following message &quot;Uncaught TypeError: contentState.getBlockMap is not a function&quot;.</p>