Socket.io-client - TypeError: socket_io_client_1.default 不是函数

Question

我已经socket.io-client安装在 Angular 5.2 应用程序中，在按照连接步骤（以前对我有用过很多次）之后，我收到了一个奇怪的错误。

TypeError: socket_io_client_1.default is not a function
    at new AuthService (auth.service.ts:15)
    at _createClass (core.js:10891)
    at _createProviderInstance$1 (core.js:10865)
    at resolveNgModuleDep (core.js:10850)
    at NgModuleRef_.get (core.js:12087)
    at resolveDep (core.js:12577)
    at createClass (core.js:12439)
    at createDirectiveInstance (core.js:12284)
    at createViewNodes (core.js:13742)
    at callViewAction (core.js:14176)

这是第 15 行 AuthService

import {Injectable} from '@angular/core';
import io from 'socket.io-client';
import {CookieService} from 'ngx-cookie-service';


@Injectable()
export class AuthService {
  socket;
  domain = 'http://localhost:3000';
  isUserLoggedIn = false;
  cookie_key = '';
  user = {};

  constructor(private cookieService: CookieService) {
    this.socket = io(this.domain);
  }

不知道此时发生了什么。任何指针？

Answer 1

用：

import * as io from 'socket.io-client'