| 1 | import isObjectLike from './isObjectLike';
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| 2 |
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| 3 | /** `Object#toString` result references. */
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| 4 | var boolTag = '[object Boolean]';
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| 5 |
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| 6 | /** Used for built-in method references. */
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| 7 | var objectProto = Object.prototype;
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| 8 |
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| 9 | /**
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| 10 | * Used to resolve the
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| 11 | * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
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| 12 | * of values.
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| 13 | */
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| 14 | var objectToString = objectProto.toString;
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| 15 |
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| 16 | /**
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| 17 | * Checks if `value` is classified as a boolean primitive or object.
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| 18 | *
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| 19 | * @static
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| 20 | * @memberOf _
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| 21 | * @since 0.1.0
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| 22 | * @category Lang
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| 23 | * @param {*} value The value to check.
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| 24 | * @returns {boolean} Returns `true` if `value` is correctly classified,
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| 25 | * else `false`.
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| 26 | * @example
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| 27 | *
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| 28 | * _.isBoolean(false);
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| 29 | * // => true
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| 30 | *
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| 31 | * _.isBoolean(null);
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| 32 | * // => false
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| 33 | */
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| 34 | function isBoolean(value) {
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| 35 | return value === true || value === false ||
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| 36 | (isObjectLike(value) && objectToString.call(value) == boolTag);
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| 37 | }
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| 38 |
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| 39 | export default isBoolean;
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