Angular 6 CSV download

I'm new to angular, currently i'm working in a project which needs an csv export. Here i'm using Angular 6 as frontend and laravel as backend

This is how i wrote laravel function using mattwebsite/excel

// Lead export to csv
public function downloadExcel(Request $request)
{
    $credentials = $request->only('token');
    $token = $credentials['token'];
    $userid = $this->getUseridFromToken($token);
    $type = "xls";
    $data = DB::table('user_mailbox AS A')
                    ->select('A.id', 'A.name', 'A.email', 'A.phone', DB::raw('DATE_FORMAT(A.send_on, "%d / %b / %Y") as send_on'), 'B.listing_heading','B.listing_id','B.listing_heading', 'C.name')
                    ->leftjoin('broker_listing AS B', 'B.listing_id', '=', 'A.listing_id')
                    ->leftjoin('users AS C', 'C.id', '=', 'A.sent_by')
                    ->where('A.sent_to', $userid)
                    ->where('A.user_type', '1')
                    ->orderBy('A.id', 'desc')->get()->toArray(); 
    Excel::create('Lead_Export', function($excel) use ($data) {
        $excel->sheet('Lead_Export', function($sheet) use ($data)
        {
            $sheet->fromArray($data);
        });
    })->download($type);
}

This is how i wrote function in angular component

    // Download leads as excel
download_excel(){
  const fd = new FormData(); 
  fd.append('token',this.token);
  this.brokerleads.downloadLeads(fd).subscribe(
    data => this.handleResponsedwnload(data),
    error => this.handleErrordwnload(error)
  );
}
handleResponsedwnload(data){ console.log('test');
  const blob = new Blob([data], { type: 'text/xls' });
  const url= window.URL.createObjectURL(blob);
  window.open(url);
}
handleErrordwnload(data){

}

service is like this

  // Download as excel
  downloadLeads(data):Observable<any>{
    return this.http.post(`${this.baseUrl}downloadExcel`, data);   
  }

view

    <a class="export-leads" href="javascript:void(0);" (click)="download_excel()" >EXPORT LEADS</a>

while doing this i'm getting response like this but file is not downloading

via Chebli Mohamed