The search engine configuration options.
Optional
loggerThe logger options.
Optional
middlewaresList of additional middlewares. A middleware is a higher-order function that composes a dispatch function to return a new dispatch function. It is useful for logging actions, performing side effects like routing, or turning an asynchronous API call into a series of synchronous actions.
Optional
navigatorAn optional function returning navigation context. (referer, location, UserAgent)
Optional
preloadedThe initial headless state. You may optionally specify it to hydrate the state from the server in universal apps, or to restore a previously serialized user session.
The search engine options.