14 lines
493 B
JavaScript
14 lines
493 B
JavaScript
var getBuiltIn = require('../internals/get-built-in');
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var isCallable = require('../internals/is-callable');
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var isPrototypeOf = require('../internals/object-is-prototype-of');
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var USE_SYMBOL_AS_UID = require('../internals/use-symbol-as-uid');
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var $Object = Object;
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module.exports = USE_SYMBOL_AS_UID ? function (it) {
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return typeof it == 'symbol';
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} : function (it) {
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var $Symbol = getBuiltIn('Symbol');
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return isCallable($Symbol) && isPrototypeOf($Symbol.prototype, $Object(it));
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};
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