text: const toString = Object.prototype.toString;
  
  export function isFunction(value) {
      return toString.call(value) === "[object Function]";
  }
  
  export function isDate(value) {
      return toString.call(value) === "[object Date]";
  }
  
  export function isObject(value) {
      return toString.call(value) === "[object Object]";
  }