ErrorLog extends BeagleLog to provide specialized handling for JavaScript errors and exceptions. It automatically sets the log level to 'error' and extracts error messages.
Properties
Inherits all properties from BeagleLog, plus:
The original error object or value that was logged. Can be an Error instance, string, or any other value.
Constructor
The error to log. Can be an Error object, string, or any other value.
- If
error is an Error instance, uses error.message as the log message
- Otherwise, converts the error to a string using
String(error)
- Automatically sets
level to 'error'
- Stores the original error in the
error property
Usage Examples
Logging an Error Object
import { ErrorLog } from 'react-native-beagle';
try {
throw new Error('Failed to fetch user data');
} catch (error) {
const log = new ErrorLog(error);
// log.message: "Failed to fetch user data"
// log.level: "error"
// log.error: Error object
}
Logging a String Error
const log = new ErrorLog('Connection timeout');
// log.message: "Connection timeout"
// log.level: "error"
Logging Custom Error Types
class ValidationError extends Error {
constructor(public field: string, message: string) {
super(message);
this.name = 'ValidationError';
}
}
const validationError = new ValidationError('email', 'Invalid email format');
const log = new ErrorLog(validationError);
// log.message: "Invalid email format"
// log.error: ValidationError instance with field property
Accessing the Original Error
try {
JSON.parse('invalid json');
} catch (error) {
const log = new ErrorLog(error);
if (log.error instanceof SyntaxError) {
console.log('JSON parsing failed');
}
}
Type Definition
class ErrorLog extends BeagleLog {
error: unknown;
constructor(error: unknown);
}