导出在下拉列表中不具有约束力的常量值

Question

我在单独的文件中有一个常量值，并在下拉选项中绑定值，工作日工作正常但间隔时间将其绑定为对象对象这是 constantvalues.ts

它工作正常

 export const weekdays =['sunday','Monday','Tuesday','wednesday','thursday'];

不工作

   export const IntervalTime =[{key:0,value:'10.00'},{key:1,value:'11.00'}];

component.ts

 import {Component,OnInit} from '@angular/core';
    import {weekdays} from './constantvalues';
      /**
     * @title Basic select
     */
    @Component({
      selector: 'select-overview-example',
      templateUrl: 'select-overview-example.html',
      styleUrls: ['select-overview-example.css'],
    })
    export class SelectOverviewExample implements OnInit {
      days=[];
    
//not working[![enter image description here][1]][1]
    
    times =[];


ngOnInit(){
  [...this.days] = weekdays;
  [...this.times]=IntervalTime;
}
    }

html:
     <mat-form-field>
      <mat-select placeholder="select Weekdays">
        <mat-option *ngFor="let day of days" [value]="day">
          {{day}}
        </mat-option>
      </mat-select>
    </mat-form-field>
    <hr/> Second Dropdrown with Array of object
    
    <mat-form-field>
      <mat-select placeholder="select Weekdays">
        <mat-option *ngFor="let time of times" [value]="time">
          {{time}}
        </mat-option>
      </mat-select>
    </mat-form-field>

demo

Answer 1

对于时间，您应该分配 time.value，而不是整个对象

<mat-form-field>
  <mat-select placeholder="select Weekdays">
    <mat-option *ngFor="let time of times" [value]="time">
      {{time.value}}
    </mat-option>
  </mat-select>
</mat-form-field>

分叉 demo

导出在下拉列表中不具有约束力的常量值

export const values not binding in dropdown

angular2-forms

angular

angular6