| 1 | import isInteger from './isInteger';
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| 2 |
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| 3 | /** Used as references for various `Number` constants. */
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| 4 | var MAX_SAFE_INTEGER = 9007199254740991;
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| 5 |
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| 6 | /**
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| 7 | * Checks if `value` is a safe integer. An integer is safe if it's an IEEE-754
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| 8 | * double precision number which isn't the result of a rounded unsafe integer.
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| 9 | *
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| 10 | * **Note:** This method is based on
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| 11 | * [`Number.isSafeInteger`](https://mdn.io/Number/isSafeInteger).
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| 12 | *
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| 13 | * @static
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| 14 | * @memberOf _
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| 15 | * @since 4.0.0
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| 16 | * @category Lang
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| 17 | * @param {*} value The value to check.
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| 18 | * @returns {boolean} Returns `true` if `value` is a safe integer,
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| 19 | * else `false`.
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| 20 | * @example
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| 21 | *
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| 22 | * _.isSafeInteger(3);
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| 23 | * // => true
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| 24 | *
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| 25 | * _.isSafeInteger(Number.MIN_VALUE);
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| 26 | * // => false
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| 27 | *
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| 28 | * _.isSafeInteger(Infinity);
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| 29 | * // => false
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| 30 | *
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| 31 | * _.isSafeInteger('3');
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| 32 | * // => false
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| 33 | */
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| 34 | function isSafeInteger(value) {
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| 35 | return isInteger(value) && value >= -MAX_SAFE_INTEGER && value <= MAX_SAFE_INTEGER;
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| 36 | }
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| 37 |
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| 38 | export default isSafeInteger;
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