missing type

src/LibDeclarations/webxr.d.ts

@@ -123,4 +123,9 @@ interface XRInputSourceChangeEvent {
     session: XRSession;
     removed: Array<XRInputSource>;
     added: Array<XRInputSource>;
+}
+
+interface XRInputSourceEvent extends Event {
+    readonly frame: XRFrame;
+    readonly inputSource: XRInputSource;
 }