diff --git a/offline-js/offline-js-tests.ts b/offline-js/offline-js-tests.ts
new file mode 100644
index 0000000000..d43f091fa6
--- /dev/null
+++ b/offline-js/offline-js-tests.ts
@@ -0,0 +1,40 @@
+// Test file for offline-js.
+/// <reference path="offline-js.d.ts" />
+
+Offline.options = {
+    checkOnLoad: false,
+    interceptRequests: true,
+    checks: {
+        xhr: { url: '/connection-test' },
+        image: { url: 'my-image.gif' },
+        active: 'image'
+    },
+    reconnect: {
+        initialDelay: 3,
+        delay: 60
+    },
+    requests: true,
+    game: false
+};
+
+Offline.check();
+
+Offline.state;
+
+var handler = () => { },
+    context = {};
+
+Offline.on("up", handler, context);
+Offline.on("down", handler, context);
+Offline.on("confirmed-up", handler, context);
+Offline.on("confirmed-down", handler, context);
+Offline.on("checking", handler, context);
+Offline.on("reconnect:started", handler, context);
+Offline.on("reconnect:stopped", handler, context);
+Offline.on("reconnect:tick", handler, context);
+Offline.on("reconnect:connecting", handler, context);
+Offline.on("reconnect:failure", handler, context);
+Offline.on("requests:flush", handler, context);
+Offline.on("requests:hold", handler, context);
+
+Offline.off("up", handler);
diff --git a/offline-js/offline-js.d.ts b/offline-js/offline-js.d.ts
new file mode 100644
index 0000000000..f52b47e0cf
--- /dev/null
+++ b/offline-js/offline-js.d.ts
@@ -0,0 +1,64 @@
+// Type definitions for Offline 0.7.14
+// Project: https://github.com/HubSpot/offline
+// Definitions by: Chris Wrench <https://github.com/cgwrench>
+// Definitions: https://github.com/borisyankov/DefinitelyTyped
+
+declare var Offline: {
+    options: OfflineOptions;
+    check: () => void;
+    state: string;
+
+    on(event: "up", handler: (e: Event) => any, context?: any): void;
+    on(event: "down", handler: (e: Event) => any, context?: any): void;
+    on(event: "confirmed-up", handler: (e: Event) => any, context?: any): void;
+    on(event: "confirmed-down", handler: (e: Event) => any, context?: any): void;
+    on(event: "checking", handler: (e: Event) => any, context?: any): void;
+    on(event: "reconnect:started", handler: (e: Event) => any, context?: any): void;
+    on(event: "reconnect:stopped", handler: (e: Event) => any, context?: any): void;
+    on(event: "reconnect:tick", handler: (e: Event) => any, context?: any): void;
+    on(event: "reconnect:connecting", handler: (e: Event) => any, context?: any): void;
+    on(event: "reconnect:failure", handler: (e: Event) => any, context?: any): void;
+    on(event: "requests:flush", handler: (e: Event) => any, context?: any): void;
+    on(event: "requests:hold", handler: (e: Event) => any, context?: any): void;
+    on(event: string, handler: (e: Event) => any, context?: any): void;
+
+    off(event: "up", handler?: (e: Event) => any): void;
+    off(event: "down", handler?: (e: Event) => any): void;
+    off(event: "confirmed-up", handler?: (e: Event) => any): void;
+    off(event: "confirmed-down", handler?: (e: Event) => any): void;
+    off(event: "checking", handler?: (e: Event) => any): void;
+    off(event: "reconnect:started", handler?: (e: Event) => any): void;
+    off(event: "reconnect:stopped", handler?: (e: Event) => any): void;
+    off(event: "reconnect:tick", handler?: (e: Event) => any): void;
+    off(event: "reconnect:connecting", handler?: (e: Event) => any): void;
+    off(event: "reconnect:failure", handler?: (e: Event) => any): void;
+    off(event: "requests:flush", handler?: (e: Event) => any): void;
+    off(event: "requests:hold", handler?: (e: Event) => any): void;
+    off(event: string, handler?: (e: Event) => any): void;
+};
+
+interface OfflineOptions {
+    // TODO Should these types be `boolean|Function`?
+    // The project documentation is not clear here.
+    checkOnLoad?: boolean;
+    interceptRequests?: boolean;
+    requests?: boolean;
+    game?: boolean;
+    checks?: OfflineChecks;
+    reconnect: {
+        initialDelay: number;
+        delay: number;
+    };
+}
+
+interface OfflineChecks {
+    // TODO "xhr" and "image" probably have different options.
+    // However, this is not stated in the project documentation.
+    xhr?: OfflineCheck;
+    image?: OfflineCheck;
+    active?: string;
+}
+
+interface OfflineCheck {
+    url: string;
+}