Colorize doesn't work on transports.Console

I created a shared logger successfully, but it prints all white, even though I’ve set colorize to true. And as a test, My Label successfully prints out in red.

// Logging with Winston
const { red } = require('colors')
const os = require('os')
const fs = require('fs')
const path = require('path')
const config = require('../data/config/config')
const winston = require('winston')
const { createLogger, format, transports } = winston
const { combine, timestamp, label, printf } = format
const tsFormat = () => (new Date()).toLocaleTimeString()
const myFormat = printf(info => {
  return `${info.timestamp} [${info.label}] ${info.level}: ${info.message}`
})

const logDir = path.resolve(os.homedir(), '.curator-server')

if (!fs.existsSync(logDir)) {
  fs.mkdirSync(logDir)
}

const logger = createLogger({
  format: combine(
    label({ label: red('My Label') }),
    timestamp(),
    myFormat
  ),
  transports: [
    new transports.Console({ level: config.logLevel, humanReadableUnhandledException: true, colorize: true }),
    new transports.File({ filename: path.resolve(logDir, 'info.log'), level: 'info' }),
    new transports.File({ filename: path.resolve(logDir, 'error.log'), level: 'error' })
  ]
})

module.exports = logger

[mempf]

Right, so I’ve looked more into this. You can’t “format.colorize()” after you use “myFormat” since the modifications colorize does would not be seen in the final message.

You would need to add colorize and myFormat to the format specifiers of each transport instead of for the whole logger.

const winston = require('winston')
const { createLogger, format, transports } = winston
const { combine, timestamp, label, printf, colorize } = format

const logger = createLogger({
  format: combine(
    label({ label: red('My Label') }),
    timestamp()
  ),
  transports: [
    new transports.Console({
      format: combine(
        colorize(),
        myFormat
      ),
      level: 'silly' }),
    new transports.File({ format: myFormat, filename: path.resolve(logDir, 'info.log'), level: 'info' }),
    new transports.File({ format: myFormat, filename: path.resolve(logDir, 'error.log'), level: 'error' })
  ]
})

[mempf]

Try moving the colorize to a format property inside your Console constructor: new transports.Console({ level: config.logLevel, format: colorize() })