Javascript Angular 中的类型错误上不存在获取属性

我正试图在我的Header组件中制作一个可折叠的菜单，但在我的ANGLE项目中，我遇到了正确的JSON格式问题.我一直收到这样的错误:

错误:src/app/components/header/header.component.html:48:49-错误 TS2339:类型上不存在属性‘subLinks’. 折叠:布尔型；链接:{标题:字符串；url:字符串；子链接:{ 标题:字符串；url:字符串；}[]；}[]；}‘.

48&lt；li*ngFor="允许项目的子链接.子链接" Class="子链接"&gt；

我似乎不能独自解决这个错误，我需要一些帮助.

My HTML template is this:个

<li *ngFor="let item of navigationItems; let i = index" class="link">
            <a [href]="item.url" class="main-wrapper">{{ item.title }}</a>
            <a class="d-inline-block main-wrapper" (click)="toggleCollapse(i)" role="button" [attr.aria-expanded]="!item.collapsed" [attr.aria-controls]="'navCollapse_' + i">
              <img *ngIf="item.collapsed" src="./assets/img/icons/plus.svg" alt="plus-icon" class="ms-3">
              <img *ngIf="!item.collapsed" src="./assets/img/icons/minus.svg" alt="minus-icon" class="ms-3">
            </a>
            <div [id]="'navCollapse_' + i" class="collapse link-collapse main-collapse" [class.show]="!item.collapsed">
              <ul class="sublink-wrapper">
                <li *ngFor="let sublink of item.sublinks" class="sublink">
                  <a [href]="sublink.url">{{ sublink.title }}</a>
                </li>
              </ul>
            </div>
          </li>

My TS code is this:个

export class HeaderComponent {
  constructor() { }

  navigationState: string = 'out';
  
  navigationItems = [
    {
      title: 'Lorem ipsum',
      collapsed: true,
      links: [
        {
          title: 'Lorem ipsum 1',
          url: 'some-url',
          sublinks: [
            { title: 'Lorem ispum 1.1', url: 'some url' },
            { title: 'Lorem ispum 1.2', url: 'some url' },
            { title: 'Lorem ispum 1.3', url: 'some url' }
          ]
        },
        {
          title: 'Lorem ipsum 2',
          url: 'some-url',
          sublinks: [
            { title: 'Lorem ispum 2.1', url: 'some url' },
            { title: 'Lorem ispum 2.2', url: 'some url' },
            { title: 'Lorem ispum 2.3', url: 'some url' },
            { title: 'Lorem ispum 2.4', url: 'some url' }
          ]
        },
        {
          title: 'Lorem ipsum 3',
          url: 'some-url',
          sublinks: [
            { title: 'Lorem ispum 3.1', url: 'some url' },
            { title: 'Lorem ispum 3.2', url: 'some url' },
            { title: 'Lorem ispum 3.3', url: 'some url' }
          ]
        },
        {
          title: 'Lorem ipsum 4',
          url: 'some-url',
          sublinks: [
            { title: 'Lorem ispum 4.1', url: 'some url' },
            { title: 'Lorem ispum 4.2', url: 'some url' },
            { title: 'Lorem ispum 4.3', url: 'some url' },
            { title: 'Lorem ispum 4.4', url: 'some url' },
            { title: 'Lorem ispum 4.5', url: 'some url' }
          ]
        },
      ]
    }
  ];

  ngOnInit(): void {
  }

  toggleCollapse(index: number): void {
    this.navigationItems[index].collapsed = !this.navigationItems[index].collapsed;
  }

}