node-logger : May serve as an alternative to winstonjs

logger.js

/*
 * ======================================================
 * node-logger: A simple logger for nodejs
 * ======================================================
 *
 * Motivation: I noticed a logging library like winstonjs 
 * could add almost 200KBs to my bundle size (un-gzipped) 
 * for doing something as simple as this 👇🏽
 */

const errorLevels = {
  error: 0,
  warn: 1,
  info: 2,
  http: 3,
  verbose: 4,
  debug: 5,
  silly: 6
}

const logger = (level, message) => {
  const envLogLevel = errorLevels[process.env.LOG_LEVEL] || 100;
  if(errorLevels[level] <= envLogLevel)
    console.log(JSON.stringify({timestamp: (new Date()).toISOString(),level, message}));
}


// Usage:
logger('info', 'Design is separating into things that can be composed. - Rich Hickey')
/* Output: 
 * {"timestamp":"2021-01-29T14:22:34.688Z","level":"info","message":"Design is separating into things that can be composed. - Rich Hickey"}
 */