logger js

class Logger {
  constructor(level = 'info') {
    this.level = level;
  }

  setLevel(level) {
    this.level = level;
  }

  log(level, message) {
    const levels = ['error', 'warn', 'info', 'debug'];
    if (levels.indexOf(level) >= levels.indexOf(this.level)) {
      console.log(`[${new Date().toISOString()}] [${level.toUpperCase()}] ${message}`);
    }
  }

  error(message) {
    this.log('error', message);
  }

  warn(message) {
    this.log('warn', message);
  }

  info(message) {
    this.log('info', message);
  }

  debug(message) {
    this.log('debug', message);
  }
}

module.exports = new Logger();

const logger = require('./logger');

logger.info('Application started');
logger.debug('Debugging information');
logger.warn('Something might be wrong');
logger.error('An error occurred');