13 lines
399 B
JavaScript
13 lines
399 B
JavaScript
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'use strict';
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var toString = Object.prototype.toString
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, toStringTagSymbol = require('es6-symbol').toStringTag
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, id = '[object Set]'
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, Global = (typeof Set === 'undefined') ? null : Set;
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module.exports = function (x) {
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return (x && ((Global && ((x instanceof Global) || (x === Global.prototype))) ||
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(toString.call(x) === id) || (x[toStringTagSymbol] === 'Set'))) || false;
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};
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