Here is a npm library which can handle window, document and global object for you: Global. Then you can safely write: import window from ‘global’ const mySpecialWindowFunction = () => { return /msie [6-9]\b/.test(window.navigator.userAgent.toLowerCase()); };
The first argument to EditorState.createWithContent is a ContentState, not a string. You need to import ContentState var EditorState = Draft.EditorState; var ContentState = Draft.ContentState; Use ContentState.createFromText And pass the result to EditorState.createWithContent. return { editorState: EditorState.createWithContent(ContentState.createFromText(‘Hello’)) };