provided support for react-native

lib/random/random-byte.js

@@ -1 +1,26 @@
-module.exports = require('nanoid/random');
+if (typeof navigator !== 'undefined' && navigator.product === 'ReactNative') {
+    module.exports = require('react-native-randombytes').randomBytes;
+} else {
+    /*jshint -W061 */ 
+    var crypto = eval("require('crypto');"); //Required for React Native to work
+    if (crypto.randomFillSync) {
+        // We reuse buffers with the same size to avoid memory fragmentations
+        // for better performance
+        var buffers = {};
+        module.exports = function (bytes) {
+            var buffer = buffers[bytes];
+            if (!buffer) {
+                // `Buffer.allocUnsafe()` faster because it don’t clean memory.
+                // We do not need it, since we will fill memory with new bytes anyway.
+                buffer = Buffer.allocUnsafe(bytes);
+                if (bytes <= 255) {
+                    buffers[bytes] = buffer;
+                }
+            }
+            return crypto.randomFillSync(buffer);
+        };
+    } else {
+        module.exports = crypto.randomBytes;
+    }
+}
+