/** Used as references for various `Number` constants. */ /** 用作各种“数字”常量的引用。 */ const MAX_SAFE_INTEGER = 9007199254740991 /** * Checks if `value` is a valid array-like length. * 检查' value '是否为有效的类数组长度。 * **Note:** This method is loosely based on * [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength). * * @since 4.0.0 * @category Lang * @param {*} value 要检查的值。 * @returns {boolean} 如果' value '是有效长度,则返回' true ',否则返回' false '。 * @example * * isLength(3) * // => true * * isLength(Number.MIN_VALUE) * // => false * * isLength(Infinity) * // => false * * isLength('3') * // => false */ function isLength(value) { return typeof value === 'number' && value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER } export default isLength