implementation.js

var logger = require('logger')(module);

logger.info('Om nom nom');

// Same output

logger.js

var Module = require('module');

module.exports = function logger(module) {

  function log(level) {
    return function () {
      var args = [(new Date()).toJSON(), level];

      if (module instanceof Module) {
        args.push(module.id);
      }

      args.push.apply(args, Array.prototype.slice.call(arguments));

      console.log.apply(console, args);
    };
  }

  var levels = [
    'trace',
    'debug',
    'info',
    'warn',
    'error',
    'fatal'
  ];

  var methods = {};

  levels.forEach(function (method) {
    methods[method] = log(method.toUpperCase());
  });

  return methods;
};