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'use strict';
module.exports = function () {
var symbol;
if (typeof Symbol !== 'function') return false;
symbol = Symbol('test symbol');
try { String(symbol); } catch (e) { return false; }
if (typeof Symbol.iterator === 'symbol') return true;
// Return 'true' for polyfills
if (typeof Symbol.isConcatSpreadable !== 'object') return false;
if (typeof Symbol.iterator !== 'object') return false;
if (typeof Symbol.toPrimitive !== 'object') return false;
if (typeof Symbol.toStringTag !== 'object') return false;
if (typeof Symbol.unscopables !== 'object') return false;
return true;
};
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