class LogWritermethod

fatal()

Writes a log message with severity ‘fatal’ (5).

fatal(message: unknown, ...data: unknown[]): void;

Notes

• The specified message may be a string, a DeferredString (the result of fmt()), an Error instance, or any other value that can be converted to a string.
• For DeferredString and AppException messages, placeholder values are included in the message data so that they can be stored separately in a structured log.

Examples

// Write a formatted log message
app.log.fatal(fmt("User not found: {name}", userData));

// Catch an error and log it
try {
  doSomethingDangerous();
} catch (err) {
  app.log.fatal(err);
}

Related

• class LogWriter
  A class that handles log messages, part of the global application context.