Custom logging via ES6 class. Extendable.

Logger.js

class Logger {
  constructor() {
    if (!Logger.instance) {
      Logger.instance = this;
    }
    return Logger.instance;
  }

  log(...args) {
    console.log(...args);
  }

  warn(...args) {
    console.warn(...args);
  }

  error(...args) {
    console.error(...args);
  }
}

// ensure Singleton
const instance = new Logger();
Object.freeze(instance);

export default instance;

You could minimize all this robust code with this implementation:

const logger = {
  log: (...args) => console.log(...args),
  warn: (...args) => console.warn(...args),
  error: (...args) => console.error(...args),
  debug: (...args) => console.debug(...args),
  info: (...args) => console.info(...args),
  table: (...args) => console.table(...args),
};

export default logger;

You could minimize all this robust code with this implementation:

const logger = {
  log: (...args) => console.log(...args),
  warn: (...args) => console.warn(...args),
  error: (...args) => console.error(...args),
  debug: (...args) => console.debug(...args),
  info: (...args) => console.info(...args),
  table: (...args) => console.table(...args),
};

export default logger;

@sayeko nice, does yours export a singleton?

yes this is a singleton.