如何在materializecss和angular中设置多选的值

<div class="input-field">
  <select multiple>
    <option value="option1">Option 1</option>
    <option value="option2">Option 2</option>
    <option value="option3">Option 3</option>
  </select>
  <label>Select Options</label>
</div>

import { Component } from '@angular/core';

@Component({
  selector: 'app-example',
  templateUrl: './example.component.html',
  styleUrls: ['./example.component.css']
})
export class ExampleComponent {
  selectedOptions: string[] = [];

  onChange(event: any) {
    this.selectedOptions = event.target.value;
  }
}

<div class="input-field">
  <select multiple [(ngModel)]="selectedOptions" (change)="onChange($event)">
    <option *ngFor="let option of options" [value]="option">{{ option }}</option>
  </select>
  <label>Select Options</label>
</div>

import { Component } from '@angular/core';

@Component({
  selector: 'app-example',
  templateUrl: './example.component.html',
  styleUrls: ['./example.component.css']
})
export class ExampleComponent {
  selectedOptions: string[] = [];
  options: string[] = ['Option 1', 'Option 2', 'Option 3'];

  onChange(event: any) {
    this.selectedOptions = event.target.value;
  }
}