判断是否为NaN

/**
 * 检查`value`是否为`NaN`
 * Checks if `value` is `NaN`
 * **Note:** diffrence
 * gloabl [isNaN] returns `true` for `undefined` and other non-number values
 * Number.isNaN returns `false` for new Number(NaN)
 * @param {*} value The value to check
 * @returns {boolean} Returns `true` if `value` is `NaN`, else `false`
 * @example
 *
 * isNaN(NaN)
 * // => true
 *
 * isNaN(new Number(NaN))
 * // => true
 *
 * isNaN(undefined)
 * // => false
 */

const numberTag = "[object Number]"

function isObjectLike(value) {
  return typeof value == "object" && value !== null;
}

function isNumber(value) {
  return (
    typeof value === "number" ||
    (isObjectLike(value) && Object.prototype.toString.call(value) === numberTag)
  )
}

function isNaN(value) {
  return isNumber(value) && value != +value
}

export default isNaN