this.httpClient.post(url1, JSON.parse(data1) , {responseType: 'blob'}).subscribe(data => {

            const link = document.createElement('a');

            const blob = new Blob([data], {type: 'application/vnd.ms-excel'});

            link.setAttribute('href', window.URL.createObjectURL(blob));

            link.setAttribute('download', 'Inventory' + new Date().getTime() + '.xls');

            link.style.visibility = 'hidden';

            document.body.appendChild(link);

            link.click();

            document.body.removeChild(link);

        });

    }