1 var isObject = require('../internals/is-object');
2 var isArray = require('../internals/is-array');
3 var wellKnownSymbol = require('../internals/well-known-symbol');
5 var SPECIES = wellKnownSymbol('species');
7 // `ArraySpeciesCreate` abstract operation
8 // https://tc39.es/ecma262/#sec-arrayspeciescreate
9 module.exports = function (originalArray, length) {
11 if (isArray(originalArray)) {
12 C = originalArray.constructor;
13 // cross-realm fallback
14 if (typeof C == 'function' && (C === Array || isArray(C.prototype))) C = undefined;
15 else if (isObject(C)) {
17 if (C === null) C = undefined;
19 } return new (C === undefined ? Array : C)(length === 0 ? 0 : length);