render.js

function renderSuccessPage(req, res, renderProps, store, next, statusCode = 200) {
    setImmediate(() => {
        try {
            res.header('Content-Type', 'text/html; charset=utf-8')

            const content = {
                html: ReactDOMServer.renderToString(<Root store={store} renderProps={renderProps} />),
                store: store.getState().toJSON(),
                head: Helmet.rewind(),
                lang: getLanguage(req)
            }

            res.status(statusCode).end(renderHtml(content))
        } catch (err) {
            console.error('[ERROR][ROS1][REQ]', req.originalUrl)
            console.error(err)
            next(err)
        }
    })
}