diff --git a/plugin.xml b/plugin.xml
index 127bef2..1cf262d 100644
--- a/plugin.xml
+++ b/plugin.xml
@@ -11,6 +11,7 @@
   <js-module src="www/cookie-handler.js" name="cookie-handler"/>
   <js-module src="www/global-configs.js" name="global-configs"/>
   <js-module src="www/helpers.js" name="helpers"/>
+  <js-module src="www/js-util.js" name="js-util"/>
   <js-module src="www/local-storage-store.js" name="local-storage-store"/>
   <js-module src="www/lodash.js" name="lodash"/>
   <js-module src="www/messages.js" name="messages"/>
diff --git a/src/browser/cordova-http-plugin.js b/src/browser/cordova-http-plugin.js
index 6d56a48..5c6a672 100644
--- a/src/browser/cordova-http-plugin.js
+++ b/src/browser/cordova-http-plugin.js
@@ -1,7 +1,7 @@
 var pluginId = module.id.slice(0, module.id.lastIndexOf('.'));
 
 var cordovaProxy = require('cordova/exec/proxy');
-var helpers = require(pluginId + '.helpers');
+var jsUtil = require(pluginId + '.js-util');
 
 function serializeJsonData(data) {
   try {
@@ -29,7 +29,7 @@ function serializeParams(params) {
   if (params === null) return '';
 
   return Object.keys(params).map(function(key) {
-    if (helpers.getTypeOf(params[key]) === 'Array') {
+    if (jsUtil.getTypeOf(params[key]) === 'Array') {
       return serializeArray(key, params[key]);
     }
 
@@ -56,7 +56,7 @@ function createXhrSuccessObject(xhr) {
   return {
     url: xhr.responseURL,
     status: xhr.status,
-    data: helpers.getTypeOf(xhr.responseText) === 'String' ? xhr.responseText : xhr.response,
+    data: jsUtil.getTypeOf(xhr.responseText) === 'String' ? xhr.responseText : xhr.response,
     headers: deserializeResponseHeaders(xhr.getAllResponseHeaders())
   };
 }
@@ -65,7 +65,7 @@ function createXhrFailureObject(xhr) {
   var obj = {};
 
   obj.headers = xhr.getAllResponseHeaders();
-  obj.error = helpers.getTypeOf(xhr.responseText) === 'String' ? xhr.responseText : xhr.response;
+  obj.error = jsUtil.getTypeOf(xhr.responseText) === 'String' ? xhr.responseText : xhr.response;
   obj.error = obj.error || 'advanced-http: please check browser console for error messages';
 
   if (xhr.responseURL) obj.url = xhr.responseURL;
diff --git a/test/js-mocha-specs.js b/test/js-mocha-specs.js
index d631793..f9ed41a 100644
--- a/test/js-mocha-specs.js
+++ b/test/js-mocha-specs.js
@@ -10,12 +10,13 @@ describe('Advanced HTTP public interface', function () {
   const getDependenciesBlueprint = () => {
     const messages = require('../www/messages');
     const globalConfigs = require('../www/global-configs');
+    const jsUtil = require('../www/js-util');
     const ToughCookie = require('../www/umd-tough-cookie');
     const lodash = require('../www/lodash');
     const WebStorageCookieStore = require('../www/local-storage-store')(ToughCookie, lodash);
     const cookieHandler = require('../www/cookie-handler')(null, ToughCookie, WebStorageCookieStore);
-    const helpers = require('../www/helpers')(cookieHandler, messages);
-    const urlUtil = require('../www/url-util')(helpers);
+    const helpers = require('../www/helpers')(jsUtil, cookieHandler, messages);
+    const urlUtil = require('../www/url-util')(jsUtil);
 
     return { exec: noop, cookieHandler, urlUtil: urlUtil, helpers, globalConfigs };
   };
@@ -131,8 +132,8 @@ describe('Advanced HTTP public interface', function () {
 });
 
 describe('URL util', function () {
-  const helpers = require('../www/helpers')(null, null);
-  const util = require('../www/url-util')(helpers);
+  const jsUtil = require('../www/js-util');
+  const util = require('../www/url-util')(jsUtil);
 
   it('parses URL with protocol, hostname and path correctly', () => {
     util.parseUrl('http://ilkimen.net/test').should.include({
diff --git a/www/advanced-http.js b/www/advanced-http.js
index a60aa3c..b6732dc 100644
--- a/www/advanced-http.js
+++ b/www/advanced-http.js
@@ -7,12 +7,13 @@ var pluginId = module.id.slice(0, module.id.lastIndexOf('.'));
 var exec = require('cordova/exec');
 var messages = require(pluginId + '.messages');
 var globalConfigs = require(pluginId + '.global-configs');
+var jsUtil = require(pluginId + '.js-util');
 var ToughCookie = require(pluginId + '.tough-cookie');
 var lodash = require(pluginId + '.lodash');
 var WebStorageCookieStore = require(pluginId + '.local-storage-store')(ToughCookie, lodash);
 var cookieHandler = require(pluginId + '.cookie-handler')(window.localStorage, ToughCookie, WebStorageCookieStore);
-var helpers = require(pluginId + '.helpers')(cookieHandler, messages);
-var urlUtil = require(pluginId + '.url-util')(helpers);
+var helpers = require(pluginId + '.helpers')(jsUtil, cookieHandler, messages);
+var urlUtil = require(pluginId + '.url-util')(jsUtil);
 var publicInterface = require(pluginId + '.public-interface')(exec, cookieHandler, urlUtil, helpers, globalConfigs);
 
 module.exports = publicInterface;
diff --git a/www/helpers.js b/www/helpers.js
index 9f33c27..2120570 100644
--- a/www/helpers.js
+++ b/www/helpers.js
@@ -1,4 +1,4 @@
-module.exports = function init(cookieHandler, messages) {
+module.exports = function init(jsUtil, cookieHandler, messages) {
   var validSerializers = ['urlencoded', 'json', 'utf8'];
   var validCertModes = ['default', 'nocheck', 'pinned', 'legacy'];
   var validClientAuthModes = ['none', 'systemstore', 'file'];
@@ -6,7 +6,6 @@ module.exports = function init(cookieHandler, messages) {
 
   return {
     b64EncodeUnicode: b64EncodeUnicode,
-    getTypeOf: getTypeOf,
     checkSerializer: checkSerializer,
     checkSSLCertMode: checkSSLCertMode,
     checkClientAuthMode: checkClientAuthMode,
@@ -43,7 +42,7 @@ module.exports = function init(cookieHandler, messages) {
   }
 
   function checkForValidStringValue(list, value, onInvalidValueMessage) {
-    if (getTypeOf(value) !== 'String') {
+    if (jsUtil.getTypeOf(value) !== 'String') {
       throw new Error(onInvalidValueMessage + ' ' + list.join(', '));
     }
 
@@ -57,14 +56,14 @@ module.exports = function init(cookieHandler, messages) {
   }
 
   function checkKeyValuePairObject(obj, allowedChildren, onInvalidValueMessage) {
-    if (getTypeOf(obj) !== 'Object') {
+    if (jsUtil.getTypeOf(obj) !== 'Object') {
       throw new Error(onInvalidValueMessage);
     }
 
     var keys = Object.keys(obj);
 
     for (var i = 0; i < keys.length; i++) {
-      if (allowedChildren.indexOf(getTypeOf(obj[keys[i]])) === -1) {
+      if (allowedChildren.indexOf(jsUtil.getTypeOf(obj[keys[i]])) === -1) {
         throw new Error(onInvalidValueMessage);
       }
     }
@@ -97,7 +96,7 @@ module.exports = function init(cookieHandler, messages) {
   }
 
   function checkForInvalidHeaderValue(value) {
-    if (getTypeOf(value) !== 'String') {
+    if (jsUtil.getTypeOf(value) !== 'String') {
       throw new Error(messages.INVALID_HEADERS_VALUE);
     }
 
@@ -105,7 +104,7 @@ module.exports = function init(cookieHandler, messages) {
   }
 
   function checkTimeoutValue(timeout) {
-    if (getTypeOf(timeout) !== 'Number' || timeout < 0) {
+    if (jsUtil.getTypeOf(timeout) !== 'Number' || timeout < 0) {
       throw new Error(messages.INVALID_TIMEOUT_VALUE);
     }
 
@@ -180,30 +179,6 @@ module.exports = function init(cookieHandler, messages) {
     return mergedHeaders;
   }
 
-  // typeof is not working reliably in JS
-  function getTypeOf(object) {
-    switch (Object.prototype.toString.call(object)) {
-      case '[object Array]':
-        return 'Array';
-      case '[object Boolean]':
-        return 'Boolean';
-      case '[object Function]':
-        return 'Function';
-      case '[object Null]':
-        return 'Null';
-      case '[object Number]':
-        return 'Number';
-      case '[object Object]':
-        return 'Object';
-      case '[object String]':
-        return 'String';
-      case '[object Undefined]':
-        return 'Undefined';
-      default:
-        return 'Unknown';
-    }
-  }
-
   function getAllowedDataTypes(dataSerializer) {
     switch (dataSerializer) {
       case 'utf8':
@@ -216,7 +191,7 @@ module.exports = function init(cookieHandler, messages) {
   }
 
   function getProcessedData(data, dataSerializer) {
-    var currentDataType = getTypeOf(data);
+    var currentDataType = jsUtil.getTypeOf(data);
     var allowedDataTypes = getAllowedDataTypes(dataSerializer);
 
     if (allowedDataTypes.indexOf(currentDataType) === -1) {
@@ -231,11 +206,11 @@ module.exports = function init(cookieHandler, messages) {
   }
 
   function handleMissingCallbacks(successFn, failFn) {
-    if (getTypeOf(successFn) !== 'Function') {
+    if (jsUtil.getTypeOf(successFn) !== 'Function') {
       throw new Error(messages.MANDATORY_SUCCESS);
     }
 
-    if (getTypeOf(failFn) !== 'Function') {
+    if (jsUtil.getTypeOf(failFn) !== 'Function') {
       throw new Error(messages.MANDATORY_FAIL);
     }
   }
@@ -249,7 +224,7 @@ module.exports = function init(cookieHandler, messages) {
       timeout: checkTimeoutValue(options.timeout || globals.timeout),
       headers: checkHeadersObject(options.headers || {}),
       params: checkParamsObject(options.params || {}),
-      data: getTypeOf(options.data) === 'Undefined' ? null : options.data,
+      data: jsUtil.getTypeOf(options.data) === 'Undefined' ? null : options.data,
       filePath: options.filePath || '',
       name: options.name || ''
     };
diff --git a/www/js-util.js b/www/js-util.js
new file mode 100644
index 0000000..a86da8b
--- /dev/null
+++ b/www/js-util.js
@@ -0,0 +1,26 @@
+module.exports = {
+  // typeof is not working reliably in JS
+  getTypeOf: function (object) {
+    switch (Object.prototype.toString.call(object)) {
+      case '[object Array]':
+        return 'Array';
+      case '[object Boolean]':
+        return 'Boolean';
+      case '[object Function]':
+        return 'Function';
+      case '[object Null]':
+        return 'Null';
+      case '[object Number]':
+        return 'Number';
+      case '[object Object]':
+        return 'Object';
+      case '[object String]':
+        return 'String';
+      case '[object Undefined]':
+        return 'Undefined';
+      default:
+        return 'Unknown';
+    }
+  }
+}
+
diff --git a/www/url-util.js b/www/url-util.js
index 802af01..043d94c 100644
--- a/www/url-util.js
+++ b/www/url-util.js
@@ -1,4 +1,4 @@
-module.exports = function init(helpers) {
+module.exports = function init(jsUtil) {
   return {
     parseUrl: parseUrl,
     appendQueryParamsString: appendQueryParamsString,
@@ -48,10 +48,10 @@ module.exports = function init(helpers) {
 
       var identifier = parentKey.length ? parentKey + '[' + key + ']' : key;
 
-      if (helpers.getTypeOf(object[key]) === 'Array') {
+      if (jsUtil.getTypeOf(object[key]) === 'Array') {
         parts.push(serializeArray(identifier, object[key], encode));
         continue;
-      } else if (helpers.getTypeOf(object[key]) === 'Object') {
+      } else if (jsUtil.getTypeOf(object[key]) === 'Object') {
         parts.push(serializeObject(identifier, object[key], encode));
         continue;
       }
@@ -66,10 +66,10 @@ module.exports = function init(helpers) {
     var parts = [];
 
     for (var i = 0; i < array.length; ++i) {
-      if (helpers.getTypeOf(array[i]) === 'Array') {
+      if (jsUtil.getTypeOf(array[i]) === 'Array') {
         parts.push(serializeArray(parentKey + '[]', array[i], encode));
         continue;
-      } else if (helpers.getTypeOf(array[i]) === 'Object') {
+      } else if (jsUtil.getTypeOf(array[i]) === 'Object') {
         parts.push(serializeObject(parentKey + '[]' + array[i], encode));
         continue;
       }