(function(global, factory) {
  typeof exports === "object" && typeof module !== "undefined" ? factory(exports) : typeof define === "function" && define.amd ? define(["exports"], factory) : (global = typeof globalThis !== "undefined" ? globalThis : global || self, factory(global.IsWhatType = {}));
})(this, function(exports2) {
  "use strict";
  function ensureType(value, checked) {
    return checked;
  }
  function getType(value) {
    return Object.prototype.toString.call(value).slice(8, -1);
  }
  const PROTOCOL = /^([a-z][a-z\d+\-.]*:)?\/\//i;
  function isAbsoluteURL(value) {
    return PROTOCOL.test(value);
  }
  function isLength(value) {
    return Number.isInteger(value) && value > -1;
  }
  function isArrayLike(value) {
    return value != null && isLength(value.length) && typeof value !== "function";
  }
  function isAsyncFunction(value) {
    return getType(value) === "AsyncFunction";
  }
  function isObject(value) {
    return value !== null && typeof value === "object";
  }
  const hasSymbol = typeof Symbol === "function" && typeof Symbol.toStringTag === "symbol";
  function isESModule(value) {
    return isObject(value) && (value.__esModule || hasSymbol && value[Symbol.toStringTag] === "Module");
  }
  function isError(value) {
    if (value == null) {
      return false;
    }
    if (value instanceof Error) {
      return true;
    }
    const { name } = value;
    return typeof name === "string" && name.endsWith("Error");
  }
  function isFunction(value) {
    return typeof value === "function";
  }
  function isIterable(value) {
    return value != null && typeof value[Symbol.iterator] === "function";
  }
  function isNumber(value) {
    return typeof value === "number" && value === value;
  }
  function isValidDate(value) {
    return value instanceof Date && value.toString() !== "Invalid Date";
  }
  function isLeapYear(value) {
    let year = value;
    if (isValidDate(value)) {
      year = value.getFullYear();
    } else if (!isNumber(value)) {
      return false;
    }
    return year % 4 === 0 && year % 100 !== 0 || year % 400 === 0;
  }
  function isNil(value) {
    return value == null;
  }
  function isPlainObject(value) {
    if (!isObject(value) || getType(value) !== "Object") {
      return false;
    }
    const prototype = Object.getPrototypeOf(value);
    return prototype === null || prototype === Object.prototype;
  }
  function isPromiseLike(value) {
    return isObject(value) && typeof value.then === "function";
  }
  function isWhat(value, type, comparingType) {
    return type === comparingType;
  }
  exports2.ensureType = ensureType;
  exports2.getType = getType;
  exports2.isAbsoluteURL = isAbsoluteURL;
  exports2.isArrayLike = isArrayLike;
  exports2.isAsyncFunction = isAsyncFunction;
  exports2.isESModule = isESModule;
  exports2.isError = isError;
  exports2.isFunction = isFunction;
  exports2.isIterable = isIterable;
  exports2.isLeapYear = isLeapYear;
  exports2.isLength = isLength;
  exports2.isNil = isNil;
  exports2.isNumber = isNumber;
  exports2.isObject = isObject;
  exports2.isPlainObject = isPlainObject;
  exports2.isPromiseLike = isPromiseLike;
  exports2.isValidDate = isValidDate;
  exports2.isWhat = isWhat;
  Object.defineProperty(exports2, Symbol.toStringTag, { value: "Module" });
});