document is not defined while generating page.generated.js

[raditya1710]

I use react 15.2.1 now, so there are some changes with React syntax (React.renderComponentToString --> ReactDOMServer.renderToString, React.renderComponent --> ReactDOM.render). But after I change it, there are errors that stated that "document is not defined" while generating page.generated.js in document.getElementById("content"), any explanation for this error?

Thank you!