1 files changed, 10 insertions, 0 deletions
diff --git a/tools/eslint/node_modules/escope/node_modules/es6-weak-map/is-native-implemented.js b/tools/eslint/node_modules/escope/node_modules/es6-weak-map/is-native-implemented.js
new file mode 100644
index 0000000000..b3fe5a594d
--- /dev/null
+++ b/tools/eslint/node_modules/escope/node_modules/es6-weak-map/is-native-implemented.js
@@ -0,0 +1,10 @@
+// Exports true if environment provides native `WeakMap` implementation,
+// whatever that is.
+
+'use strict';
+
+module.exports = (function () {
+	if (typeof WeakMap === 'undefined') return false;
+	return (Object.prototype.toString.call(WeakMap.prototype) ===
+			'[object WeakMap]');
+}());