How do I format error logs with Winston in Node.JS?

Question

I have a Node.js app that it using Winston for logging. I am printing my logs using printf like this:

winston.createLogger({
  level: 'debug',
  format: winston.format.combine(            
    winston.format.timestamp({ format: 'HH:mm:ss.SSSSS'}),
    winston.format.printf(log => `[${log.level}] [${log.timestamp}] ${log.message} `)
  ),
  transports: []
});

This works fine except in the case of "error" logs. When a log has a log level of 'error', the log writes an entry that's formatted like this: [${log.level}] [${log.timestamp}] ${log.message}${error.message}. Notice, there is no space between the log message and the error message.

How do I put a space between the log message and an error message if the log level is an error?

Answer 1

As of the documentation winton only supports that format parameter for info logging.