| 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; |