256color compatible logger configuration for winston.

logger.js

var clc = require('cli-color');

var { Logger, transports } = require('winston');
var { formatter, timestamp } = require('winston-console-formatter')({
  colors: ((term) => (~term.indexOf('256')) ? {
    silly: clc.xterm(33),
    debug: clc.xterm(207),
    info: clc.xterm(48),
    warn: clc.xterm(226),
    error: clc.xterm(196),
    verbose: clc.xterm(8),
  } : {
    silly: clc.blue,
    debug: clc.cyan,
    info: clc.green,
    warn: clc.yellow,
    error: clc.red,
    verbose: clc.white,
  })(process.env.TERM || '')
});

var logger = new Logger({
  level: process.env.LOG_LEVEL || 'info',
  transports: [
    new transports.Console({
      formatter,
      timestamp
    })
  ]
});

module.exports = { logger };