diff options
Diffstat (limited to 'node_modules/core-js/modules/_array-species-constructor.js')
| -rw-r--r-- | node_modules/core-js/modules/_array-species-constructor.js | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/node_modules/core-js/modules/_array-species-constructor.js b/node_modules/core-js/modules/_array-species-constructor.js new file mode 100644 index 00000000..0771c236 --- /dev/null +++ b/node_modules/core-js/modules/_array-species-constructor.js @@ -0,0 +1,16 @@ +var isObject = require('./_is-object'); +var isArray = require('./_is-array'); +var SPECIES = require('./_wks')('species'); + +module.exports = function (original) { + var C; + if (isArray(original)) { + C = original.constructor; + // cross-realm fallback + if (typeof C == 'function' && (C === Array || isArray(C.prototype))) C = undefined; + if (isObject(C)) { + C = C[SPECIES]; + if (C === null) C = undefined; + } + } return C === undefined ? Array : C; +}; |
