角5：通用類型&#39;HttpRequest <T> &#39;

Question

編寫攔截器后，我得到一個錯誤：

error TS2314: Generic type 'HttpRequest<T>' requires 1 type argument(s).

這是我的源代碼：

import { Injectable } from '@angular/core';
import { HttpErrorResponse, HttpEvent, HttpHandler, HttpInterceptor, HttpRequest } from '@angular/common/http';
import { Observable } from 'rxjs/Observable';
import { UserService } from '@dockers/core/user/user.service';

@Injectable()
export class ErrorInterceptor implements HttpInterceptor {
    constructor(private userService: UserService) {}

    intercept(req: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {
        return next.handle(req).catch((err: any) => {
            console.log('Caught error', err);
            if (err instanceof HttpErrorResponse && err.status === 401) {
                this.userService.logoutUser();
            }
            return Observable.throw(err);
        });
    }
}

任何解決方案和幫助都會很棒。 謝謝！

Answer 1

該問題的答案是<T>在'HttpRequest<T>'應該是一個混凝土型復合或原始