Version 1

[yaffs-website] / node_modules / core-js / library / modules / _array-species-constructor.js

diff --git a/node_modules/core-js/library/modules/_array-species-constructor.js b/node_modules/core-js/library/modules/_array-species-constructor.js
new file mode 100644 (file)
index 0000000..a715389
--- /dev/null
+++ b/node_modules/core-js/library/modules/_array-species-constructor.js
@@ -0,0 +1,16 @@
+var isObject = require('./_is-object')
+  , isArray  = require('./_is-array')
+  , 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;
+};
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