diff --git a/Libraries/Components/WebView/WebView.ios.js b/Libraries/Components/WebView/WebView.ios.js
index 15ab9e676..83b1c26f6 100644
--- a/Libraries/Components/WebView/WebView.ios.js
+++ b/Libraries/Components/WebView/WebView.ios.js
@@ -43,6 +43,8 @@ var NavigationType = {
   other: RCTWebViewManager.NavigationType.Other,
 };
 
+var JSNavigationScheme = RCTWebViewManager.JSNavigationScheme;
+
 type ErrorEvent = {
   domain: any;
   code: any;
@@ -75,6 +77,7 @@ var defaultRenderError = (errorDomain, errorCode, errorDesc) => (
 
 var WebView = React.createClass({
   statics: {
+    JSNavigationScheme: JSNavigationScheme,
     NavigationType: NavigationType,
   },
 
@@ -86,7 +89,6 @@ var WebView = React.createClass({
     bounces: PropTypes.bool,
     scrollEnabled: PropTypes.bool,
     automaticallyAdjustContentInsets: PropTypes.bool,
-    shouldInjectAJAXHandler: PropTypes.bool,
     contentInset: EdgeInsetsPropType,
     onNavigationStateChange: PropTypes.func,
     startInLoadingState: PropTypes.bool, // force WebView to show loadingView on first load
@@ -95,6 +97,11 @@ var WebView = React.createClass({
      * Used for android only, JS is enabled by default for WebView on iOS
      */
     javaScriptEnabledAndroid: PropTypes.bool,
+    /**
+     * Used for iOS only, sets the JS to be injected when the webpage loads.
+     */
+    injectedJavascriptIOS: PropTypes.string,
+
     /**
      * Used for iOS only, sets whether the webpage scales to fit the view and the
      * user can change the scale
@@ -152,9 +159,9 @@ var WebView = React.createClass({
         style={webViewStyles}
         url={this.props.url}
         html={this.props.html}
+        injectedJavascriptIOS={this.props.injectedJavascriptIOS}
         bounces={this.props.bounces}
         scrollEnabled={this.props.scrollEnabled}
-        shouldInjectAJAXHandler={this.props.shouldInjectAJAXHandler}
         contentInset={this.props.contentInset}
         automaticallyAdjustContentInsets={this.props.automaticallyAdjustContentInsets}
         onLoadingStart={this.onLoadingStart}
diff --git a/React/Views/RCTWebView.h b/React/Views/RCTWebView.h
index 52e7baaa3..90846e349 100644
--- a/React/Views/RCTWebView.h
+++ b/React/Views/RCTWebView.h
@@ -9,14 +9,16 @@
 
 #import "RCTView.h"
 
+extern NSString *const RCTJSNavigationScheme;
+
 @class RCTEventDispatcher;
 
 @interface RCTWebView : RCTView
 
 @property (nonatomic, strong) NSURL *URL;
 @property (nonatomic, assign) UIEdgeInsets contentInset;
-@property (nonatomic, assign) BOOL shouldInjectAJAXHandler;
 @property (nonatomic, assign) BOOL automaticallyAdjustContentInsets;
+@property (nonatomic, copy) NSString *injectedJavascriptIOS;
 
 - (instancetype)initWithEventDispatcher:(RCTEventDispatcher *)eventDispatcher NS_DESIGNATED_INITIALIZER;
 
diff --git a/React/Views/RCTWebView.m b/React/Views/RCTWebView.m
index 9e2fd3504..693f00eaa 100644
--- a/React/Views/RCTWebView.m
+++ b/React/Views/RCTWebView.m
@@ -18,6 +18,13 @@
 #import "RCTView.h"
 #import "UIView+React.h"
 
+// Special scheme that allow JS to notify the WebView to emit
+// navigation event.
+//
+// JavaScript Example:
+//   window.location.href = 'react-js-navigation://hello'
+NSString *const RCTJSNavigationScheme = @"react-js-navigation";
+
 @interface RCTWebView () <UIWebViewDelegate, RCTAutoInsetsProtocol>
 
 @end
@@ -26,6 +33,7 @@
 {
   RCTEventDispatcher *_eventDispatcher;
   UIWebView *_webView;
+  NSString *_injectedJavascriptIOS;
 }
 
 - (instancetype)initWithEventDispatcher:(RCTEventDispatcher *)eventDispatcher
@@ -118,6 +126,19 @@ RCT_NOT_IMPLEMENTED(-initWithCoder:(NSCoder *)aDecoder)
   return _webView.backgroundColor;
 }
 
+- (void)setinjectedJavascriptIOS:(NSString *)jsStr
+{
+  if (_injectedJavascriptIOS == jsStr) {
+    return;
+  }
+
+  if ([_injectedJavascriptIOS isEqualToString:jsStr]) {
+    return;
+  }
+
+  _injectedJavascriptIOS = [jsStr copy];
+}
+
 - (NSMutableDictionary *)baseEvent
 {
   NSURL *url = _webView.request.URL;
@@ -136,7 +157,6 @@ RCT_NOT_IMPLEMENTED(-initWithCoder:(NSCoder *)aDecoder)
 
 #pragma mark - UIWebViewDelegate methods
 
-static NSString *const RCTJSAJAXScheme = @"react-ajax";
 
 - (BOOL)webView:(__unused UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request
  navigationType:(UIWebViewNavigationType)navigationType
@@ -152,8 +172,8 @@ static NSString *const RCTJSAJAXScheme = @"react-ajax";
     [_eventDispatcher sendInputEventWithName:@"topLoadingStart" body:event];
   }
 
-  // AJAX handler
-  return ![request.URL.scheme isEqualToString:RCTJSAJAXScheme];
+  // JS Navigation handler
+  return ![request.URL.scheme isEqualToString:RCTJSNavigationScheme];
 }
 
 - (void)webView:(__unused UIWebView *)webView didFailLoadWithError:(NSError *)error
@@ -177,33 +197,8 @@ static NSString *const RCTJSAJAXScheme = @"react-ajax";
 
 - (void)webViewDidFinishLoad:(UIWebView *)webView
 {
-  if (_shouldInjectAJAXHandler) {
-
-    // From http://stackoverflow.com/questions/5353278/uiwebviewdelegate-not-monitoring-xmlhttprequest
-
-    [webView stringByEvaluatingJavaScriptFromString:[NSString stringWithFormat:@"\
-      var s_ajaxListener = new Object();                       \n\
-      s_ajaxListener.tempOpen = XMLHttpRequest.prototype.open; \n\
-      s_ajaxListener.tempSend = XMLHttpRequest.prototype.send; \n\
-      s_ajaxListener.callback = function() {                   \n\
-        window.location.href = '%@://' + this.url;             \n\
-      }                                                        \n\
-      XMLHttpRequest.prototype.open = function(a,b) {          \n\
-        s_ajaxListener.tempOpen.apply(this, arguments);        \n\
-        s_ajaxListener.method = a;                             \n\
-        s_ajaxListener.url = b;                                \n\
-        if (a.toLowerCase() === 'get') {                       \n\
-          s_ajaxListener.data = (b.split('?'))[1];             \n\
-        }                                                      \n\
-      }                                                        \n\
-      XMLHttpRequest.prototype.send = function(a,b) {          \n\
-        s_ajaxListener.tempSend.apply(this, arguments);        \n\
-        if (s_ajaxListener.method.toLowerCase() === 'post') {  \n\
-          s_ajaxListener.data = a;                             \n\
-        }                                                      \n\
-        s_ajaxListener.callback();                             \n\
-      }                                                        \n\
-    ", RCTJSAJAXScheme]];
+  if (_injectedJavascriptIOS != nil) {
+    [webView stringByEvaluatingJavaScriptFromString:_injectedJavascriptIOS];
   }
 
   // we only need the final 'finishLoad' call so only fire the event when we're actually done loading.
diff --git a/React/Views/RCTWebViewManager.m b/React/Views/RCTWebViewManager.m
index a5de572bd..ff5fcf26a 100644
--- a/React/Views/RCTWebViewManager.m
+++ b/React/Views/RCTWebViewManager.m
@@ -27,14 +27,15 @@ RCT_REMAP_VIEW_PROPERTY(url, URL, NSURL);
 RCT_REMAP_VIEW_PROPERTY(html, HTML, NSString);
 RCT_REMAP_VIEW_PROPERTY(bounces, _webView.scrollView.bounces, BOOL);
 RCT_REMAP_VIEW_PROPERTY(scrollEnabled, _webView.scrollView.scrollEnabled, BOOL);
+RCT_REMAP_VIEW_PROPERTY(scalesPageToFit, _webView.scalesPageToFit, BOOL);
+RCT_EXPORT_VIEW_PROPERTY(injectedJavascriptIOS, NSString);
 RCT_EXPORT_VIEW_PROPERTY(contentInset, UIEdgeInsets);
 RCT_EXPORT_VIEW_PROPERTY(automaticallyAdjustContentInsets, BOOL);
-RCT_EXPORT_VIEW_PROPERTY(shouldInjectAJAXHandler, BOOL);
-RCT_REMAP_VIEW_PROPERTY(scalesPageToFit, _webView.scalesPageToFit, BOOL);
 
 - (NSDictionary *)constantsToExport
 {
   return @{
+    @"JSNavigationScheme": RCTJSNavigationScheme,
     @"NavigationType": @{
       @"LinkClicked": @(UIWebViewNavigationTypeLinkClicked),
       @"FormSubmitted": @(UIWebViewNavigationTypeFormSubmitted),
diff --git a/packager/react-packager/src/JSTransformer/__tests__/Cache-test.js b/packager/react-packager/src/JSTransformer/__tests__/Cache-test.js
index df3ccfd7e..3877b3dd5 100644
--- a/packager/react-packager/src/JSTransformer/__tests__/Cache-test.js
+++ b/packager/react-packager/src/JSTransformer/__tests__/Cache-test.js
@@ -229,7 +229,7 @@ describe('JSTransformer Cache', function() {
         return Promise.resolve('baz value');
       });
 
-      jest.runAllImmediates();
+      jest.runAllTicks();
       expect(fs.writeFile).toBeCalled();
     });
   });