How do I change my node winston JSON output to be single line

Question

When I create a nodejs winston console logger and set json:true, it always output JSON logs in multiline format. If I pipe these to a file and try to grep that file

Answer 1

"winston": "^3.0.0"

function createAppLogger() {
  const { combine, timestamp, printf, colorize } = format;

  return createLogger({
    level: 'info',
    format: combine(
      colorize(),
      timestamp(),
      printf(info => {
        return `${info.timestamp} [${info.level}] : ${JSON.stringify(info.message)}`;
      })
    ),
    transports: [new transports.Console()]
  });
}

Output:

2018-08-11T13:13:37.554Z [info] : {"data":{"hello":"Hello, World"}}