<nz-select style="width: 150px;" class="ml10" nzShowSearch nzAllowClear nzPlaceHolder="" [(ngModel)]="selectedValueRent" (ngModelChange)="search(searchApartmentList,$event.split(";"),searchResourceList)" >
<nz-option nzLabel="{{item.text}}" nzValue="{{item.value}}" *ngFor="let item of filterRentList" (click)="filter("rent_status",item.value)"></nz-option> 
I hope it becomes an empty array [] when it is null, instead of null reporting an error
, what should I write
you can do this in the $event.split (';') operation in the search function of ts.
(ngModelChange)="search(searchApartmentList,$event ,searchResourceList)"
search(apartments,event,resources){
// event
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