Merge pull request #777 from scala-js/fix/websocket-onerror

Fix `WebSocket#onerror` ... again ...

Author: armanbilge

api-reports/2_12.txt

@@ -26732,7 +26732,7 @@ WebSocket[JC] def close(code: Int?, reason: String?): Unit
 WebSocket[JC] def dispatchEvent(evt: Event): Boolean
 WebSocket[JC] def extensions: String
 WebSocket[JC] var onclose: js.Function1[CloseEvent, _]
-WebSocket[JC] var onerror: js.Function1[Error, _]
+WebSocket[JC] var onerror: js.Function1[Event, _]
 WebSocket[JC] var onmessage: js.Function1[MessageEvent, _]
 WebSocket[JC] var onopen: js.Function1[Event, _]
 WebSocket[JC] def readyState: Int

api-reports/2_13.txt

@@ -26732,7 +26732,7 @@ WebSocket[JC] def close(code: Int?, reason: String?): Unit
 WebSocket[JC] def dispatchEvent(evt: Event): Boolean
 WebSocket[JC] def extensions: String
 WebSocket[JC] var onclose: js.Function1[CloseEvent, _]
-WebSocket[JC] var onerror: js.Function1[Error, _]
+WebSocket[JC] var onerror: js.Function1[Event, _]
 WebSocket[JC] var onmessage: js.Function1[MessageEvent, _]
 WebSocket[JC] var onopen: js.Function1[Event, _]
 WebSocket[JC] def readyState: Int

dom/src/main/scala/org/scalajs/dom/WebSocket.scala

@@ -54,7 +54,7 @@ class WebSocket(var url: String = js.native, var protocol: String = js.native) e
   var onclose: js.Function1[CloseEvent, _] = js.native
 
   /** An event listener to be called when an error occurs. This is a simple event named "error". */
-  var onerror: js.Function1[Error, _] = js.native
+  var onerror: js.Function1[Event, _] = js.native
 
   /** A string indicating the type of binary data being transmitted by the connection. This should be either "blob" if
     * DOM Blob objects are being used or "arraybuffer" if ArrayBuffer objects are being used.