typeof/index.js

Node module. typeOf('a string') == 'string', typeOf([]) == 'array', etc.. Also supports named functions detections aka javascript classes

var toString = Object.prototype.toString;

module.exports = function(object) {
  var type = typeof object;

  if (type === 'undefined') {
    return 'undefined';
  }
  
  if (object) {
    type = object.constructor.name; 
  } else if (type === 'object') {
    type = toString.call(object).slice(8, -1);
  }

  return type.toLowerCase();
}