17 lines
475 B
JavaScript
17 lines
475 B
JavaScript
var isObject = require('./_is-object');
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var isArray = require('./_is-array');
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var SPECIES = require('./_wks')('species');
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module.exports = function (original) {
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var C;
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if (isArray(original)) {
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C = original.constructor;
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// cross-realm fallback
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if (typeof C == 'function' && (C === Array || isArray(C.prototype))) C = undefined;
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if (isObject(C)) {
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C = C[SPECIES];
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if (C === null) C = undefined;
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}
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} return C === undefined ? Array : C;
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};
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