logger.js

const levels = {
  ERROR: 4,
  WARN: 3,
  INFO: 2,
  DEBUG: 1,
  VERBOSE: 0
};
let level = 0;

export default {
  /**
   * Set log level, this value should be a string
   * 	ERROR, WARN, INFO, DEBUG
   * @param  {[type]} val [description]
   * @return {[type]}     [description]
   */
  setLevel: val => {
    console.log("log level set to ", val);
    level = levels[val];
  },

  verbose: (...args) => {
    if (level <= 0) console.log("VERBOSE:", ...args);
  },

  debug: (...args) => {
    if (level <= 1) console.log("DEBUG:", ...args);
  },

  info: (...args) => {
    if (level <= 2) console.log("INFO:", ...args);
  },

  warn: (...args) => {
    if (level <= 3) console.warn("WARN:", ...args);
  },

  error: (...args) => {
    if (level <= 4) console.error("ERROR:", ...args);
  }
};