JS Http Get function, how to read returning header

Please describe the question in detail and share your code, configuration, and other relevant info.

This is an example of HTTP GET function

this.A.HTTP_GET_AZURE_TABLE(this.A.node_selected)
      .subscribe(data => {
        console.log("azure tables");        
        console.log(data);        
      }, err => {
        console.log("ERROR");        
        console.log(err);
      });
HTTP_GET_AZURE_TABLE(deviceid): Observable<any> {   //pc
    var sastoken="23awedsad"
     var Gatway_Data_api = 'https:.....'+deviceid+"()"+sastoken;
     return this.http.get(Gatway_Data_api, {
       headers: new HttpHeaders().set('Accept', 'application/json;odata=nometadata')
       //params: new HttpParams()//.set('deviceid', this.accountid).set('tokenid', this.tokenid)
     })
   }

What must I change so that the returning header can also be read?

Thanks