# run(_:) Run the browser and receive updates when when the set of discovered endpoints change. ``` final func run(_ handler: @escaping @isolated(any) @Sendable ([Provider.Endpoint]) async throws -> Void) async throws ``` ## Parameters `handler` The closure to which discovered endpoints will be delivered. Return `.continue` from this closure to continue browsing, `finish(endpoints)` to return the discovered endpoints from `run()`, and do not return anything to browse forever. ## Discussion Starts the browser, which will cause the browser to begin browsing for services on the network. A `stateUpdateHandler` may be used to determine when the state changes. If the browser fails, the state will transition to failed with an associated `NWError` value. Otherwise, the state will transition to ready. A failed state will cause `run()` to throw an exception. Return `.continue` from the closure passed to `run()` if the desired endpoints have not been found to continue browsing. Return `.finish(endpoints)` if the desired endpoints have been found. The value associated with `.finish` will be returned from `run()`. To browse forever, do not return any value from the closure. `run()` should only be called once on a browser, and multiple calls to `run()` will throw exceptions. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)