10 lines
254 B
JavaScript
10 lines
254 B
JavaScript
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'use strict';
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module.exports = function (x) {
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if (!x) return false;
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if (typeof x === 'symbol') return true;
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if (!x.constructor) return false;
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if (x.constructor.name !== 'Symbol') return false;
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return (x[x.constructor.toStringTag] === 'Symbol');
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};
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