如何防止退格键在angular2中返回页面？

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

@Component({
  selector: 'app-my-component',
  template: '...'
})
export class MyComponent {
  constructor() {}

  @HostListener('document:keydown', ['$event'])
  handleKeyboardEvent(event: KeyboardEvent) {
    if (event.key === 'Backspace') {
      event.preventDefault();
    }
  }
}