.

node_modules/object-keys/index.js

@@ -0,0 +1,32 @@
+'use strict';
+
+var slice = Array.prototype.slice;
+var isArgs = require('./isArguments');
+
+var origKeys = Object.keys;
+var keysShim = origKeys ? function keys(o) { return origKeys(o); } : require('./implementation');
+
+var originalKeys = Object.keys;
+
+keysShim.shim = function shimObjectKeys() {
+	if (Object.keys) {
+		var keysWorksWithArguments = (function () {
+			// Safari 5.0 bug
+			var args = Object.keys(arguments);
+			return args && args.length === arguments.length;
+		}(1, 2));
+		if (!keysWorksWithArguments) {
+			Object.keys = function keys(object) { // eslint-disable-line func-name-matching
+				if (isArgs(object)) {
+					return originalKeys(slice.call(object));
+				}
+				return originalKeys(object);
+			};
+		}
+	} else {
+		Object.keys = keysShim;
+	}
+	return Object.keys || keysShim;
+};
+
+module.exports = keysShim;