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

The winston transports provide a way to override the stringify method, so by modifying the config above I got single line JSON output.

New config:

winston = require('winston')
logger = new (winston.Logger)({
  transports: [
    new winston.transports.Console({
     json: true,
     stringify: (obj) => JSON.stringify(obj)
    })
  ]
})