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16 lines
475 B
16 lines
475 B
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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