diff --git a/sockjs-client/sockjs-client-tests.ts b/sockjs-client/sockjs-client-tests.ts
new file mode 100644
index 000000000..53199ad0d
--- /dev/null
+++ b/sockjs-client/sockjs-client-tests.ts
@@ -0,0 +1,48 @@
+/// <reference path="./sockjs-client.d.ts" />
+
+import * as SockJS from 'sockjs-client';
+import BaseEvent = __SockJSClient.BaseEvent;
+import SockJSClass = __SockJSClient.SockJSClass;
+
+let sockJs: SockJSClass;
+
+sockJs = new SockJS('url');
+sockJs = SockJS('url');
+sockJs = SockJS('url', null, {
+  server: '1233445',
+  sessionId: 23,
+  transports: 'websocket'
+});
+sockJs = SockJS('url', null, {
+  sessionId: () => 'SID',
+  transports: ['websocket', 'eventsource']
+});
+
+let listener = (e: BaseEvent) => e;
+let listenerObj = {
+  handleEvent: (e: BaseEvent) => e
+};
+
+sockJs.addEventListener('onopen', listener);
+sockJs.addEventListener('onclose', listener, true);
+sockJs.addEventListener('onopen', listenerObj);
+sockJs.addEventListener('onclose', listenerObj, true);
+
+sockJs.removeEventListener('onopen', listener);
+sockJs.removeEventListener('onclose', listener, true);
+sockJs.removeEventListener('onopen', listenerObj);
+sockJs.removeEventListener('onclose', listenerObj, true);
+
+sockJs.onopen = e => console.log(e);
+sockJs.onmessage = e => console.log(e.data);
+sockJs.onclose = e => console.log(e.code, e.reason, e.wasClean);
+
+let testStates = SockJS.CONNECTING !== -1 && SockJS.OPEN !== -1 &&
+                  SockJS.CLOSING !== -1 && SockJS.CLOSED !== -1;
+
+sockJs.send('send');
+sockJs.send({x: 1});
+
+sockJs.close(100, 'reason');
+sockJs.close(200);
+sockJs.close();
diff --git a/sockjs-client/sockjs-client.d.ts b/sockjs-client/sockjs-client.d.ts
new file mode 100644
index 000000000..322f82139
--- /dev/null
+++ b/sockjs-client/sockjs-client.d.ts
@@ -0,0 +1,65 @@
+// Type definitions for sockjs-client 1.0.3
+// Project: https://github.com/sockjs/sockjs-client
+// Definitions by: Emil Ivanov <https://github.com/vladev>, Alexander Rusakov <https://github.com/arusakov/>
+// Definitions: https://github.com/borisyankov/DefinitelyTyped
+
+declare namespace __SockJSClient {
+  interface BaseEvent {
+    type: string;
+  }
+
+  interface OpenEvent extends BaseEvent {}
+
+  interface CloseEvent extends BaseEvent {
+    code: number;
+    reason: string;
+    wasClean: boolean;
+  }
+
+  interface MessageEvent extends BaseEvent {
+    data: string;
+  }
+
+  interface SessionGenerator {
+    (): string;
+  }
+
+  interface Options {
+    server?: string;
+    sessionId?: number | SessionGenerator;
+    transports?: string | string[]
+  }
+
+  enum State {
+    CONNECTING = 0, OPEN, CLOSING, CLOSED
+  }
+
+  interface SockJSClass extends EventTarget {
+    readyState: State;
+    protocol: string;
+    url: string;
+    onopen: (e: OpenEvent) => any;
+    onclose: (e: CloseEvent) => any;
+    onmessage: (e: MessageEvent) => any;
+    send(data: any): void;
+    close(code?: number, reason?: string): void;
+  }
+}
+
+declare module 'sockjs-client' {
+  import SockJSClass = __SockJSClient.SockJSClass;
+  import Options = __SockJSClient.Options;
+  import State = __SockJSClient.State;
+
+  var SockJS: {
+    new(url: string, _reserved?: any, options?: Options): SockJSClass;
+    (url: string, _reserved?: any, options?: Options): SockJSClass;
+    prototype: SockJSClass;
+    CONNECTING: State;
+    OPEN: State;
+    CLOSING: State;
+    CLOSED: State;
+  };
+
+  export = SockJS;
+}