Placeholder for nz select in ngzorro isn't working

Question

Here is the code snippet. The placeholder doesn't appear in the dropdown, is blank before choosing an option.

<nz-select
           nzShowSearch=true
            class="preview-dropdown"
            [(ngModel)]="selectedValue"
            (ngModelChange)="browserSelection($event)"
            nzAllowClear
            nzPlaceHolder="Choose browser">
            <nz-option *ngFor="let browser of browserOptions" [nzValue]="browser.value" [nzLabel]="browser.name"></nz-option>
        </nz-select>

Answer 1

This works for me:

<nz-select 
    nzSize="large"
    formControlName="category"
    [(ngModel)]="x.category"
    [nzPlaceHolder]="'Select a category'"
    >