我最近更新到 Angular v9 并且根据更改日志中的定义,不推荐使用使用 Angular 功能或由指令或组件扩展的未修饰基类。
所以我的应用程序中有很多 mixin,如下所示:
破坏:
export const Destroy = <T extends Constructor>(base: T = class {} as T) =>
class extends base implements OnDestroy {
destroy$ = new Subject<boolean>();
ngOnDestroy(): void {
this.destroy$.next(true);
this.destroy$.complete();
}
};
滚动:
export const Scroll = <T extends Constructor>(base: T = class {
} as T) =>
class extends base {
public scrollToFirstError(form: FormGroup, scrollSelector?: string) {
form.markAllAsTouched();
const target = jQuery('.ng-invalid:not("form")').first();
const scrollContainer = jQuery(scrollSelector || 'html,body');
const subHeaderHeight = scrollSelector ? 0 : Number.parseInt(getComputedStyle(document.documentElement)
.getPropertyValue('--height').trim(), 10);
scrollContainer.animate(
{ scrollTop: jQuery(target).offset().top - jQuery(scrollContainer).offset().top - subHeaderHeight - 50 }, 'slow');
target.focus();
}
};
在我的组件中扩展它,例如,
export class ComponentA extends Destroy(Scroll)
并尝试访问这些 mixins 的属性会引发以下错误:
this.apiService.getData().pipe(takeUntil(this.destroy$)... // Property 'destroy$' does not exist on type 'ComponentA'.
this.scrollToFirstError(this.form, '.modal'); // Property 'scrollToFirstError' does not exist on type 'ComponentA'.
任何人都可以帮我提出解决问题的建议吗?提前致谢!
*********更新*********
在我的组件中:
export const MixinedClasses: any = Destroy(Scroll());
@Component({
selector: 'app-loan-list',
templateUrl: './loan-list.component.html',
styleUrls: ['./loan-list.component.scss']
})
export class Component extends MixinedClasses {}