ngx-webrtc-lib

ngx-webrtc-lib

This library provides an easy-to-integrate UI for video communication between two users in an Angular application. Built using the Agora WebRTC SDK, it offers full control over the video communication experience, enabling you to customize it based on your needs.

With ngx-webrtc-lib, you can easily integrate real-time, peer-to-peer video communication features into your web app. This is ideal for building applications that require direct video interaction, such as customer support, remote consultations, or any use case involving live, two-way video communication.

Prerequisites

To get started with Agora, follow this guide to retrieve the AppID.

Installation

Install ngx-webrtc-lib from npm:

npm install ngx-webrtc-lib

Standalone Component support

To use the library in standalone mode, follow these steps:

Provide WebRtc configuration in app.configs.ts file

import { provideWebRtc } from 'ngx-webrtc-lib';

export const appConfig: ApplicationConfig = {
  providers: [
    provideWebRtc({
      AppID: 'Agora AppID',
    }),
    // Other providers
  ],
};

Include WebRtcComponent in the imports of your standalone host component:

import { WebRtcComponent } from 'ngx-webrtc-lib';

@Component({
  standalone: true,
  template: `<ngx-webrtc .../>`,
  imports: [
    WebRtcComponent,
  ],
  ...
})
export class HostComponent {
  // Host component logic
}

NgModule support

To use the library with NgModules, import WebRtcModule into your module's imports:

import { WebRtcModule } from 'ngx-webrtc-lib';

@NgModule({
  ...
  imports: [
    WebRtcModule.forRoot({
      AppID: 'Agora AppID',
    }),
  ]
  ...
})

Basic usage

Add WebRtcComponent to your component template:

<ngx-webrtc
  [channel]="channel"
  [displaySmallScreen]="true"
  [uid]="uid"
  [token]="token"
  (callEnd)="onCallEnd()"
></ngx-webrtc>

Advanced usage

The library allows you to display a video call confirmation dialog. To use the dialog service:

• Inject VideoCallDialogService into your component or service.
• Call the open method with the required data.

This returns VideoCallDialog object with an API that allows you to:

• Programmatically close the dialog
• Accept the call, which will open WebRtcComponent
• Subscribe to the dialog state

import { VideoCallDialogService, VideoCallDialogData } from 'ngx-webrtc-lib';

constructor(private dialogService: VideoCallDialogService) { }

onDialogOpen(): void {
  const dialog = this.dialogService.open({
    uid: this.uid,
    token: this.token,
    channel: this.channelId,
    outcome: this.outcome,
    remoteUser: this.remoteUser,
    localUser: this.localUser,
  });

  setTimeout(() => dialog.close(), 7000);
  dialog.afterConfirmation().subscribe((data: VideoCallDialogData) => console.log(data));
}

Import assets in your angular.json file

"assets": [
  {
    "glob": "**/*",
    "input": "./node_modules/ngx-webrtc-lib/src/assets/",
    "output": "./assets/"
  }
],

For real-life video call confirmation behavior with multiple clients, where one client declines the call, and the result immediately reflects on the other clients, you need to implement your own custom solution. This is an example of the implementation using web-sockets.

How to build lib for development

git clone https://github.com/TarasMoskovych/ngx-webrtc.git
cd ngx-webrtc
npm ci
npm start

Version Compatibility

The supported versions start from 3.x, which is compatible with Angular 12. The next major version after 3.x is 13.x, which corresponds to Angular 13. From there, each library version aligns with its respective Angular major version (e.g., 14.x for Angular 14, 15.x for Angular 15, etc.). For NodeJS compatibility, refer to the Angular Version Reference.

API reference

AgoraConfig

Name	Description
AppID	The App ID provided by Agora to initialize the Agora SDK.
debug	Enable debugging for Agora SDK. Default value false
useVirtualBackground	Enable Agora Virtual Background feature (only the "blur" is currently supported). Default value false

WebRtcComponent

Name	Description
@Input() uid: string	User identifier.
@Input() token: string	Agora token for Secure Authentication. Default value null
@Input() channel: string	Channel identifier.
@Input() displaySmallScreen: boolean	Display small screen toggle. Default value false
@Input() remoteUser: User	Represents the remote user in the call. Optional, used for reference or display purposes.
@Input() localUser: User	Represents the current user in the call. Optional, used for reference or display purposes.
@Output() callEnd: EventEmitter	Event that is emitted when the call is ended.

VideoCallDialogService

Name	Description
open: (VideoCallDialogData) => VideoCallDialog	Renders VideoCallComponent in the dialog.

VideoCallDialogData

Name	Description
uid: string	User identifier.
channel: string	Channel identifier.
token: string	Agora token for Secure Authentication. Default value null
outcome: boolean	Defines the UI for incoming or outgoing call modes.
remoteUser: User	Represents the remote user in the call. It replaces the user field and should be used instead.
localUser: User	Represents the current user in the call. Optional, used for reference or display purposes.

VideoCallDialog

Name	Description
acceptCall: () => void	Closes the confirmation dialog and opens WebRtcComponent with passed data before.
close: () => void	Closes the dialog with video-call confirmation component.
afterConfirmation: () => Observable<VideoCallDialogData | null>;	Returns Observable with the data depends on accepting or declining the call.
afterCallEnd: () => Observable;	Returns Observable with the value when the call is ended.

User

Name	Description
name: string	The name of the user.
photoURL: string	The URL of the user's profile photo.