1 files changed, 20 insertions, 0 deletions
diff --git a/node_modules/core-js/internals/add-to-unscopables.js b/node_modules/core-js/internals/add-to-unscopables.js
new file mode 100644
index 0000000..4af733d
--- /dev/null
+++ b/node_modules/core-js/internals/add-to-unscopables.js
@@ -0,0 +1,20 @@
+var wellKnownSymbol = require('../internals/well-known-symbol');
+var create = require('../internals/object-create');
+var definePropertyModule = require('../internals/object-define-property');
+
+var UNSCOPABLES = wellKnownSymbol('unscopables');
+var ArrayPrototype = Array.prototype;
+
+// Array.prototype[@@unscopables]
+// https://tc39.github.io/ecma262/#sec-array.prototype-@@unscopables
+if (ArrayPrototype[UNSCOPABLES] == undefined) {
+  definePropertyModule.f(ArrayPrototype, UNSCOPABLES, {
+    configurable: true,
+    value: create(null)
+  });
+}
+
+// add a key to Array.prototype[@@unscopables]
+module.exports = function (key) {
+  ArrayPrototype[UNSCOPABLES][key] = true;
+};