| var isInteger = require('./isInteger'); | |
| /** Used as references for various `Number` constants. */ | |
| var MAX_SAFE_INTEGER = 9007199254740991; | |
| /** | |
| * Checks if `value` is a safe integer. An integer is safe if it's an IEEE-754 | |
| * double precision number which isn't the result of a rounded unsafe integer. | |
| * | |
| * **Note:** This method is based on | |
| * [`Number.isSafeInteger`](https://mdn.io/Number/isSafeInteger). | |
| * | |
| * @static | |
| * @memberOf _ | |
| * @since 4.0.0 | |
| * @category Lang | |
| * @param {*} value The value to check. | |
| * @returns {boolean} Returns `true` if `value` is a safe integer, else `false`. | |
| * @example | |
| * | |
| * _.isSafeInteger(3); | |
| * // => true | |
| * | |
| * _.isSafeInteger(Number.MIN_VALUE); | |
| * // => false | |
| * | |
| * _.isSafeInteger(Infinity); | |
| * // => false | |
| * | |
| * _.isSafeInteger('3'); | |
| * // => false | |
| */ | |
| function isSafeInteger(value) { | |
| return isInteger(value) && value >= -MAX_SAFE_INTEGER && value <= MAX_SAFE_INTEGER; | |
| } | |
| module.exports = isSafeInteger; |