Errors
## Why?
Since the Camera library is quite big, there is a lot that can "go wrong". The react-native-vision-camera library provides thoroughly typed errors to help you quickly identify the cause and fix the problem.
```ts
switch (error.code) {
case "device/configuration-error":
console.log("Failed to configure the camera device.")
break
case "device/microphone-unavailable":
console.log("This camera device does not have a microphone.")
break
case "capture/recording-in-progress":
console.log("Another recording is already in progress!")
break
default:
console.error(error)
break
}
```
## The Error types
The `CameraError` type is a baseclass type for all other errors and provides the following properties:
* `code`: A typed code in the form of `{domain}/{code}` that can be used to quickly identify and group errors
* `message`: A non-localized message text that provides a more information and context about the error and possibly problematic values.
* (optional) `cause`: An `ErrorWithCause` instance that provides information about the cause of the error.
* `cause.message`: The message of the error that caused the camera error. This is localized on iOS.
* `cause.code?`: The native error's error-code. (iOS only)
* `cause.domain?`: The native error's domain. (iOS only)
* `cause.details?`: More dictionary-style information about the cause. (iOS only)
* `cause.stacktrace?`: A native Java stacktrace for the cause. (Android only)
* `cause.cause?`: The cause that caused the given error. (Recursive) (Optional)
### Runtime Errors
The `CameraRuntimeError` represents any kind of error that occured while mounting the Camera view, or an error that occured during the runtime.
The `` UI Component provides an `onError` function that will be invoked every time an unexpected runtime error occured.
```tsx
function App() {
const onError = useCallback((error: CameraRuntimeError) => {
console.error(error)
}, [])
return
}
```
### Capture Errors
The `CameraCaptureError` represents any kind of error that occured only while capturing a photo or recording a video.
```tsx
function App() {
const camera = useRef(null)
const onPress = useCallback(() => {
try {
const photo = await camera.current.takePhoto()
} catch (e) {
if (e instanceof CameraCaptureError) {
switch (e.code) {
case "file-io-error":
console.error("Failed to write photo to disk!")
break
default:
console.error(e)
break
}
}
}
}, [camera]);
return
}
```
