如果j = 0，设置禁用option-html

Question

是否可以设置选择选项disabled，如果值为j = 0?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>

Answer 1

试试这个:

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

或this，如果不工作:

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

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