From 2f73ad0241453fac379925a8c48426c5125ed2eb Mon Sep 17 00:00:00 2001
From: Corentin Smith <corentin.smith@gmail.com>
Date: Fri, 5 Feb 2016 12:08:49 -0800
Subject: [PATCH] Add String.prototype.includes polyfill

Summary:
Add a polyfill for `String.prototype.includes` taken from MDN (https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Global_Objects/String/includes)
See https://github.com/facebook/react-native/issues/5727
Closes https://github.com/facebook/react-native/pull/5735

Reviewed By: svcscm

Differential Revision: D2906667

Pulled By: vjeux

fb-gh-sync-id: e02f605bf57171062b29a98b98ba9fc898cedfc2
---
 .../Resolver/polyfills/String.prototype.es6.js    | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/packager/react-packager/src/Resolver/polyfills/String.prototype.es6.js b/packager/react-packager/src/Resolver/polyfills/String.prototype.es6.js
index afc68d76a..c455ef1ee 100644
--- a/packager/react-packager/src/Resolver/polyfills/String.prototype.es6.js
+++ b/packager/react-packager/src/Resolver/polyfills/String.prototype.es6.js
@@ -83,3 +83,18 @@ if (!String.prototype.repeat) {
     return result;
   };
 }
+
+if (!String.prototype.includes) {
+  String.prototype.includes = function(search, start) {
+    'use strict';
+    if (typeof start !== 'number') {
+      start = 0;
+    }
+    
+    if (start + search.length > this.length) {
+      return false;
+    } else {
+      return this.indexOf(search, start) !== -1;
+    }
+  };
+}