def self.render_to_string(element)
    %x{ console.error("Warning: `React.render_to_string` is deprecated in favor of `React::Server.render_to_string`."); }
    if !(`typeof ReactDOMServer === 'undefined'`)
      React::RenderingContext.build { `ReactDOMServer.renderToString(#{element.to_n})` } # v0.15+
    elsif !(`typeof React.renderToString === 'undefined'`)