javascript - Angular ngModel 未使用 ngFor [HTML 选择输入] 选择

Question

https://stackblitz.com/edit/angular-j7iiaw?file=src/app/app.component.ts

选择输入是“”而不是1

HTML

<select [(ngModel)]="subcategoria.categoria" class="input-default" name="status_categoria" id="status_categoria">
  <option *ngFor="let categoria of categorias" value="{{categoria.id}}">{{categoria.nome}}</option>
</select>

typescript

subcategoria: Array<any> = [{
    categoria:1
  }];
  categorias: Array<any> = [{id:1,nome:"one"},{id:2,nome:"two"}];

Answer 1

subcategoria 是一个数组，我想你想访问 subcategoria[0].categoria。或者您需要将 subcategoria 的值更改为

subcategoria = {
    categoria:1
};

This is the working fix