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					38 lines
				
				949 B
			
		
		
			
		
	
	
					38 lines
				
				949 B
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											3 years ago
										 
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								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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