Error Handling

Error Handling

How errors are reported, and how to tell them apart.

Errors arrive through the error event (scan and resolve failures) and as promise rejections (publishService, unpublishService, checkLocalNetworkAccess). Both have the same shape:

zeroconf.on('error', error => {
  // error.message, error.code, error.domain, error.serviceName
  if (error.domain === 'DNSSD' && error.code === -65555) {
    // iOS: the service type is missing from NSBonjourServices
  } else if (error.domain === 'DNSSD' && error.code === -65570) {
    // iOS: Local Network access denied
  } else if (error.domain === 'RNZeroconf' && error.code === 'TIMEOUT') {
    // iOS: could not resolve error.serviceName in time
  }
})

Add an error listener. Native errors are only emitted to JavaScript when at least one error listener is registered.

The full list of domains and codes is in the API Reference.

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See the API Reference for every option, event and error code.