在angular6中使用预选数据选中该复选框

selectedOptions: string[] = ['option1', 'option3'];

<div *ngFor="let option of options">
  <input type="checkbox" [(ngModel)]="option.checked" [checked]="selectedOptions.includes(option.value)">
  {{ option.label }}
</div>

options = [
  { value: 'option1', label: 'Option 1' },
  { value: 'option2', label: 'Option 2' },
  { value: 'option3', label: 'Option 3' },
  // ...
];

onCheckboxChange(option: any) {
  if (option.checked) {
    this.selectedOptions.push(option.value);
  } else {
    const index = this.selectedOptions.indexOf(option.value);
    if (index >= 0) {
      this.selectedOptions.splice(index, 1);
    }
  }
}

<div *ngFor="let option of options">
  <input type="checkbox" [(ngModel)]="option.checked" [checked]="selectedOptions.includes(option.value)" (change)="onCheckboxChange(option)">
  {{ option.label }}
</div>