Added TypeScript type definition, Added missing constants to make it FULLY complies to websocket standard

Author: Tony Lee

index.d.ts

@@ -0,0 +1,52 @@
+declare module 'robust-websocket' {
+
+    type Listener<K extends keyof WebSocketEventMap> = (this: WebSocket, ev: WebSocketEventMap[K]) => any;
+    type ShouldReconnectFunc = (event: Event, websocket: RobustWebSocket) => number;
+
+    interface UserOptions {
+        timeout: number;
+        shouldReconnect: ShouldReconnectFunc;
+        automaticOpen: true;
+    }
+
+    interface RobustWebSocket {
+        binaryType: string;
+
+        readonly bufferedAmount: number;
+        readonly extensions: string;
+        readonly protocol: string;
+        readonly readyState: number;
+        readonly url: string;
+        readonly CLOSED: number;
+        readonly CLOSING: number;
+        readonly CONNECTING: number;
+        readonly OPEN: number;
+
+        onclose: (this: WebSocket, ev: CloseEvent) => any;
+        onerror: (this: WebSocket, ev: Event) => any;
+        onmessage: (this: WebSocket, ev: MessageEvent) => any;
+        onopen: (this: WebSocket, ev: Event) => any;
+
+        close(code?: number, reason?: string): void;
+        open(): void;
+        send(data: any): void;
+
+        // Copied and modified from lib.es6.d.ts
+        addEventListener<K extends keyof WebSocketEventMap>(type: K, listener: Listener<K>): void;
+        removeEventListener<K extends keyof WebSocketEventMap>(type: K, listener: Listener<K>): void;
+        dispatchEvent(evt: Event): boolean;
+
+    }
+
+    const RobustWebSocket: {
+        prototype: RobustWebSocket;
+
+        new(url: string,
+            protocols?: string | string[],
+            userOptions?: UserOptions | ShouldReconnectFunc): RobustWebSocket;
+    };
+
+    export = RobustWebSocket;
+
+}
+

robust-websocket.js

@@ -175,6 +175,12 @@
         })
       })
 
+      ;['CLOSED', 'CLOSING', 'CONNECTING', 'OPEN'].forEach(function (name) {
+        Object.defineProperty(self, name, {
+          value: WebSocket[name]
+        });
+      })
+
       attachConnectivityEvents()
     }