fix: colVis extension bug fix with ngTemplateRef

Author: shanmukhateja

src/angular-datatables.directive.ts

@@ -72,7 +72,10 @@ export class DataTableDirective implements OnDestroy, OnInit {
  let options: ADTSettings = {
  rowCallback: (row, data, index) => {
  if (dtOptions.columns) {
- const columns = dtOptions.columns;
+ // `colVis` extension support
+ // See: https://github.com/l-lin/angular-datatables/issues/1576
+ const visibleTableColumns = (self.dt.columns().visible() as any).toArray();
+ const columns = dtOptions.columns.filter((_,i) => visibleTableColumns[i]);
  // Filter columns with pipe declared
  const colsWithPipe = columns.filter(x => x.ngPipeInstance && !x.ngTemplateRef);
  // Iterate