ngx-bootstrap: Modal opens up as small instead of large

If you want to pass data to modal component while opening modal,

openModal() {
   const initialState = {
     data:"Test data"
   }
   this.bsModalRef = this.modalService.show(modalComponent, {initialState, class: 'modal-lg'});
}

Try like this :

openModal() {
   this.bsModalRef = this.modalService.show(modalComponent, { class: 'modal-lg' });
}