将WebSocket与AngularJS一起使用

https://github.com/PatrickJS/angular-websocket 在我的简单应用程序库。

我的AngularJS版本是:

Angular CLI: 11.2.0
Node: 14.15.5
OS: darwin x64

Angular: 11.2.0
... animations, cli, common, compiler, compiler-cli, core, forms
... platform-browser, platform-browser-dynamic, router
Ivy Workspace: Yes

Package                         Version
---------------------------------------------------------
@angular-devkit/architect       0.1102.0
@angular-devkit/build-angular   0.1102.0
@angular-devkit/core            11.2.0
@angular-devkit/schematics      11.2.0
@schematics/angular             11.2.0
@schematics/update              0.1102.0
rxjs                            6.6.3
typescript                      4.1.5

I'm not using bower for managing packages so to install the websocket library I use : 

npm install angular-websocket --save

which installs successfully.

To use the web socket library I declare a new component : 

import { Component2 } from 'angular-websocket'

@Component2({
    selector: 'courses',
    template: `
        <h2>{{ title }}</h2>
        <ul>
            <li *ngFor="let course of courses">
                {{ course }}
                </li>
                </ul>
        `
})

Error: src/app/courses.component.ts:5:28 - error TS7016: Could not find a declaration file for module 'angular-websocket'. '/Users/hello-world/node_modules/angular-websocket/dist/angular-websocket.js' implicitly has an 'any' type.
  Try `npm i --save-dev @types/angular-websocket` if it exists or add a new declaration (.d.ts) file containing `declare module 'angular-websocket';`

5 import { Component2 } from 'angular-websocket'

执行后 npm i --save-dev @types/angular-websocket executing ng serve :

Error: src/app/courses.component.ts:5:10 - error TS2305: Module '"../../node_modules/@types/angular-websocket"' has no exported member 'Component2'.

5 import { Component2 } from 'angular-websocket'

如何导入和使用带有组件的WebSocket库?