diff --git a/types/react-native/globals.d.ts b/types/react-native/globals.d.ts
new file mode 100644
index 0000000000..8ab096406f
--- /dev/null
+++ b/types/react-native/globals.d.ts
@@ -0,0 +1,17 @@
+/*
+ * This file is necessary to declare global functions that might also be included by `--lib dom`.
+ * Due to a TypeScript bug, these cannot be placed inside a `declare global` block in index.d.ts.
+ */
+
+//
+// Timer Functions
+//
+declare function clearInterval(handle: number): void;
+declare function clearTimeout(handle: number): void;
+declare function setInterval(handler: (...args: any[]) => void, timeout: number): number;
+declare function setTimeout(handler: (...args: any[]) => void, timeout: number): number;
+declare function clearImmediate(handle: number): void;
+declare function setImmediate(handler: (...args: any[]) => void): number;
+
+declare function cancelAnimationFrame(handle: number): void;
+declare function requestAnimationFrame(callback: (time: number) => void): number;
diff --git a/types/react-native/index.d.ts b/types/react-native/index.d.ts
index d7648997f5..f07b6df158 100644
--- a/types/react-native/index.d.ts
+++ b/types/react-native/index.d.ts
@@ -11,7 +11,7 @@
 
 ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
 //
-// USING: these definitions are meant to be used with the TSC compiler target set to ES6
+// USING: these definitions are meant to be used with the TSC compiler target set to at least ES2015.
 //
 // USAGE EXAMPLES: check the RNTSExplorer project at https://github.com/bgrieder/RNTSExplorer
 //
@@ -23,6 +23,8 @@
 
 /// <reference types="react" />
 
+/// <reference path="globals.d.ts" />
+
 export type MeasureOnSuccessCallback = (
         x: number,
         y: number,
@@ -642,15 +644,23 @@ type GeolocationReturnType = {
     coords: {
         latitude: number
         longitude: number
-        altitude?: number
-        accuracy?: number
-        altitudeAccuracy?: number
-        heading?: number
-        speed?: number
+        altitude: number | null
+        accuracy: number
+        altitudeAccuracy: number | null
+        heading: number | null
+        speed: number | null
     }
     timestamp: number
 }
 
+type GeolocationError = {
+    code: number;
+    message: string;
+    PERMISSION_DENIED: number;
+    POSITION_UNAVAILABLE: number;
+    TIMEOUT: number;
+}
+
 interface PerpectiveTransform {
     perspective: number;
 }
@@ -8373,23 +8383,25 @@ export interface I18nManagerStatic {
 }
 
 export interface GeolocationStatic {
-    /*
-        * Invokes the success callback once with the latest location info.  Supported
-        * options: timeout (ms), maximumAge (ms), enableHighAccuracy (bool)
-        * On Android, this can return almost immediately if the location is cached or
-        * request an update, which might take a while.
-        */
-    getCurrentPosition(geo_success: (position: GeolocationReturnType) => void, geo_error?: (error: Error) => void, geo_options?: GetCurrentPositionOptions): void
+    /**
+     * Invokes the success callback once with the latest location info.  Supported
+     * options: timeout (ms), maximumAge (ms), enableHighAccuracy (bool)
+     * On Android, this can return almost immediately if the location is cached or
+     * request an update, which might take a while.
+     */
+    getCurrentPosition(geo_success: (position: GeolocationReturnType) => void, geo_error?: (error: GeolocationError) => void, geo_options?: GetCurrentPositionOptions): void
 
-    /*
-        * Invokes the success callback whenever the location changes.  Supported
-        * options: timeout (ms), maximumAge (ms), enableHighAccuracy (bool), distanceFilter(m)
-        */
-    watchPosition(success: (position: Geolocation) => void, error?: (error: Error) => void, options?: WatchPositionOptions): void
+    /**
+     * Invokes the success callback whenever the location changes.  Supported
+     * options: timeout (ms), maximumAge (ms), enableHighAccuracy (bool), distanceFilter(m)
+     */
+    watchPosition(success: (position: GeolocationReturnType) => void, error?: (error: GeolocationError) => void, options?: WatchPositionOptions): number
 
     clearWatch(watchID: number): void
 
     stopObserving(): void
+
+    requestAuthorization(): void;
 }
 
 export interface OpenCameraDialogOptions {
@@ -9230,6 +9242,33 @@ export var PointPropType: React.Requireable<any>
 declare global {
     function require(name: string): any;
 
+    /**
+     * Console polyfill
+     * @see https://facebook.github.io/react-native/docs/javascript-environment.html#polyfills
+     */
+    interface Console {
+        error(message?: any, ...optionalParams: any[]): void
+        info(message?: any, ...optionalParams: any[]): void
+        log(message?: any, ...optionalParams: any[]): void
+        warn(message?: any, ...optionalParams: any[]): void
+        trace(message?: any, ...optionalParams: any[]): void
+        debug(message?: any, ...optionalParams: any[]): void
+        table(...data: any[]): void;
+    }
+
+    var console: Console
+
+    /**
+     * Navigator object for accessing location API
+     * @see https://facebook.github.io/react-native/docs/javascript-environment.html#polyfills
+     */
+    interface Navigator {
+        readonly product: string;
+        readonly geolocation: Geolocation;
+    }
+
+    var navigator: Navigator;
+
     /**
      * This contains the non-native `XMLHttpRequest` object, which you can use if you want to route network requests
      * through DevTools (to trace them):