javascript - Angular 2分配问题

Question

我正在尝试分配一个格式化的值，下面的代码运行良好

export class AppComponent {
  public urlObj = this._urlService.get('GET_CLIENT_ID');
  url = this._urlService.formatURL('root', this.urlObj.URL);
  constructor(private _urlService: UrlService) {
  }
 }

但是当我尝试直接更改 urlObj.URL 时，它不像

export class AppComponent {
  public urlObj = this._urlService.get('GET_CLIENT_ID');
  this.urlObj.URL = this._urlService.formatURL('root', this.urlObj.URL);
  constructor(private _urlService: UrlService) {
  }
}

它说 Unexpected token at this.urlObj

Answer 1

您的 _urlService 在构造函数级别初始化。尝试在其中进行赋值操作:

export class AppComponent {
  public urlObj; 

  constructor(private _urlService: UrlService) {
   this._urlService.get('GET_CLIENT_ID');
   this.urlObj.URL = this._urlService.formatURL('root', this.urlObj.URL);
  }