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