如果 j = 0,则设置选项-html 禁用

Set option-html disabled if j = 0

如果值为 j = 0,是否可以设置 select 选项 disabled? j值取自数据库。

<ng-container *ngFor="let interventi of variabileIntervento; index as i">
           <tr *ngFor="let variante of interventi.varianti; index as j">
             <td><select [(ngModel)]="type" (change)="changeTotal()">
               <option selected disabled>Select</option>  
               <option value="0">{{interventi.supIntonacate[j]}}</option>
               <option value="1">{{interventi.supEvIi[j]}}</option>
               <option value="2">{{interventi.supIvEi[j]}}</option></select></td>

试试这个:

<option selected [disabled]="j === 0 ? true : false">Select</option>

或者这个,如果不起作用:

<option selected [attr.disabled]="j === 0 ? 'disabled' : null">Select<option>

来源:https://angular.io/guide/binding-syntax#property-and-attribute-comparison