Angular 6 Material <mat-select>多个使用表单控件设置默认值

import { Component } from '@angular/core';
import { FormControl, FormGroup } from '@angular/forms';

@Component({
  selector: 'app-your-component',
  templateUrl: 'your.component.html',
})
export class YourComponent {
  form: FormGroup;

  constructor() {
    this.form = new FormGroup({
      selectControl: new FormControl('default-value'), // 设置默认值
    });
  }
}

<form [formGroup]="form">
  <mat-form-field>
    <mat-select formControlName="selectControl">
      <mat-option value="option1">Option 1</mat-option>
      <mat-option value="option2">Option 2</mat-option>
      <mat-option value="option3">Option 3</mat-option>
    </mat-select>
  </mat-form-field>
</form>