class ReactOnRails::ServerRenderingPool::RubyEmbeddedJavaScript

def exec_server_render_js(js_code, render_options, js_evaluator = nil)

rubocop:disable Metrics/CyclomaticComplexity
Calling code will probably call 'html_safe' on return value before rendering to the view.
js_code MUST RETURN json stringify Object
Note, js_code does not have to be based on React.
hasErrors: true if server rendering errors
consoleReplayScript: script for replaying console
html: string of HTML for direct insertion on the page by evaluating js_code
Returns a Hash:

logging_on_server: put on server logs, not just in browser console
trace: saves the executed JS to a file, used in development
Using these options:
render_options: lib/react_on_rails/react_component/render_options.rb
js_code: JavaScript expression that returns a string. 
def exec_server_render_js(js_code, render_options, js_evaluator = nil)
  js_evaluator ||= self
  if render_options.trace
    @file_index ||= 1
    trace_js_code_used("Evaluating code to server render.", js_code,
                       "tmp/server-generated-#{@file_index % 10}.js")
    @file_index += 1
  end
  begin
    result = if render_options.streaming?
               js_evaluator.eval_streaming_js(js_code, render_options)
             else
               js_evaluator.eval_js(js_code, render_options)
             end
  rescue StandardError => err
    msg = <<~MSG
      Error evaluating server bundle. Check your webpack configuration.
      ===============================================================
      Caught error:
      #{err.message}
      ===============================================================
    MSG
    if err.message.include?("ReferenceError: self is not defined")
      msg << "\nError indicates that you may have code-splitting incorrectly enabled.\n"
    end
    msg << "\n#{Utils.default_troubleshooting_section}\n"
    raise ReactOnRails::Error, msg, err.backtrace
  end
  return parse_result_and_replay_console_messages(result, render_options) unless render_options.streaming?
  # Streamed component is returned as stream of strings.
  # We need to parse each chunk and replay the console messages.
  result.transform { |chunk| parse_result_and_replay_console_messages(chunk, render_options) }
end