差不多！为此，请使用反应形式:

Almost ! Use a reactive form for that :

<form [formGroup]="myForm">
  <mat-form-field class="full-width">
    <input matInput placeholder="Weather" formControlName="weather">
  </mat-form-field>
</form>
<button mat-raised-button (click)="myForm.reset()">Reset</button>


export class Example{
  myForm: FormGroup;

  constructor(private fb: FormBuilder) { 
    this.myForm = fb.group({
      weather: ''
    });
  }

  // If the HTML code doesn't work, simply call this function
  reset() {
    this.myForm.reset();
  }
}