18 lines
570 B
JavaScript
18 lines
570 B
JavaScript
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'use strict';
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var classof = require('../internals/classof');
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var hasOwn = require('../internals/has-own-property');
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var isNullOrUndefined = require('../internals/is-null-or-undefined');
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var wellKnownSymbol = require('../internals/well-known-symbol');
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var Iterators = require('../internals/iterators');
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var ITERATOR = wellKnownSymbol('iterator');
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var $Object = Object;
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module.exports = function (it) {
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if (isNullOrUndefined(it)) return false;
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var O = $Object(it);
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return O[ITERATOR] !== undefined
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|| '@@iterator' in O
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|| hasOwn(Iterators, classof(O));
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};
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