Fix barcode scanning on Android 4.2

Author: wvengen

www/index.html

@@ -49,6 +49,7 @@ <h1>Example</h1>
             </div>
         </div>
         <script type="text/javascript" src="cordova.js"></script>
+        <script type="text/javascript" src="js/polyfill.js"></script>
         <script type="text/javascript" src="js/lodash.custom.js"></script>
         <script type="text/javascript" src="js/machina.js"></script>
         <script type="text/javascript" src="js/util.js"></script>

www/js/polyfill.js

@@ -0,0 +1,17 @@
+
+// Needed for Android 4.2
+// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/includes#Polyfill
+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;
+    }
+  };
+}