how to receive window postmessage event in angular 9

1window.addEventListener("message", () => {
2   this.receiveMessage();
3}, false)
4

1receiveMessage: any = (event: any) =>  {
2  //...
3}
4

1constructor(private _authService: AuthService, private _router: Router) { 
2   if (window.addEventListener) {
3     window.addEventListener("message", this.receiveMessage.bind(this), false);
4   } else {
5      (<any>window).attachEvent("onmessage", this.receiveMessage.bind(this));
6   }
7}
8