gitignore file, by default, when a new project is created. settings.json: Contains information about server configuration that is used to serve the project's manifest.īoth of these files have information that is specific to your local computer.devices.json: Contains information about devices that have opened this project recently.expo directory is created at the root of that project. When you start the development server in a project for the first time, a. If you don't use the flag and your computer has no internet connection, then offline support will automatically be enabled, it will just take a bit longer to verify the reachability.Įxpo CLI makes network requests to sign manifests with your user credentials to ensure sensitive information is sandboxed in reusable runtimes like Expo Go.expo directory Offline will prevent the CLI from making network requests. You can develop without a network connection by using the -offline flag: Some Windows users have also reported needing modify their antivirus settings to allow Ngrok to work. Be sure to check for Ngrok outages before reporting an issue. This is often related to intermittent connection problems with the Ngrok servers. Tunneling requires a third-party hosting service, this means it may sometimes experience intermittent issues like ngrok tunnel took too long to connect or Tunnel connection has been closed. Tunnels require a network connection on both devices, meaning this feature cannot be used with the -offline flag.Expo CLI mitigates the risk of exposure by adding entropy to the beginning of the URL. Tunnel URLs are public and can be accessed by any device with a network connection.Tunneling is slower than local connections because requests must be forwarded to a public URL.This will serve your app from a public URL like. ![]() You can force the URL to be any value with the EXPO_PACKAGER_PROXY_URL environment variable. -https: Start the dev server using a secure origin.-port: Port to start the dev server on (does not apply to webpack or tunnel URLs).You can change this behavior to localhost-only by using the flag npx expo start -localhost. Server URLīy default, the project is served over a LAN connection. The run commands also use -dev-client after compiling the development build, by default. You can also switch the launch target during runtime by pressing S in the Terminal UI. ![]()
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