From 4186cc9d9a7533f78d88be976f0a8a2757604fc5 Mon Sep 17 00:00:00 2001
From: Jordan Harband <ljharb@gmail.com>
Date: Wed, 10 Dec 2014 00:40:41 -0800
Subject: [PATCH] Implementation.

---
 index.js | 36 ++++++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)
 create mode 100644 index.js

diff --git a/index.js b/index.js
new file mode 100644
index 0000000..0590ad8
--- /dev/null
+++ b/index.js
@@ -0,0 +1,36 @@
+'use strict';
+
+var flagsGetter = function flags() {
+	var str = String(this);
+	return str.slice(str.lastIndexOf('/') + 1);
+};
+
+var supportsDescriptors = (function () {
+	if (!Object.defineProperty) {
+		return false;
+	}
+	try {
+		Object.defineProperty({}, 'x', {});
+		return true;
+	} catch (e) { /* this is IE 8. */
+		return false;
+	}
+}());
+
+var flags = Function.call.bind(flagsGetter);
+
+flags.shim = function flagsShim() {
+	if (!supportsDescriptors) {
+		throw new TypeError('RegExp.prototype.flags requires a true ES5 environment that supports property descriptors');
+	}
+	if (/a/mig.flags !== 'gim') {
+		Object.defineProperty(RegExp.prototype, 'flags', {
+			configurable: true,
+			enumerable: false,
+			get: flagsGetter
+		});
+	}
+	return flags;
+};
+
+module.exports = flags;