[Home](./index.md) > [@firebase/firestore](./firestore.md) > [/](./firestore_.md) > [Settings](./firestore_.settings.md) > [experimentalAutoDetectLongPolling](./firestore_.settings.experimentalautodetectlongpolling.md) ## Settings.experimentalAutoDetectLongPolling property Configures the SDK's underlying transport (WebChannel) to automatically detect if long-polling should be used. This is very similar to `experimentalForceLongPolling`, but only uses long-polling if required. This setting will likely be enabled by default in future releases and cannot be combined with `experimentalForceLongPolling`. Signature: ```typescript experimentalAutoDetectLongPolling?: boolean; ```