Mapa de objetos de los parámetros HTTP mutuamente excluyentes con FromString
let httpParams = new HttpParams({ fromObject: { aaa: 111, bbb: 222 } });
Precious Polecat
let httpParams = new HttpParams({ fromObject: { aaa: 111, bbb: 222 } });getCountries(data: any) {
return this.httpClient.get("/api/countries", {params: data})
}