How to Build a Video Chat App with JavaScript and WebRTC

Virtual interactions, especially one-on-one video chat, have become very popular in today’s socially remote times. For instantaneous client connections and team collaboration, the majority of businesses throughout the world want to implement the WebRTC video call app. Let’s Build a Video Chat App with JavaScript and WebRTC.

How to Make a Video Calling App with WebRTC

As a JavaScript video call SDK provider, ZEGOCLOUD offers developers a fast and easy way to implement WebRTC video call functionality. Its SDK uses WebRTC technology to achieve high-quality audio and video communication in the browser. It also provides powerful features such as real-time interaction, screen sharing, beauty filters, etc., to meet the needs of users in different scenarios.

In addition, ZEGOCLOUD also provides WebRTC video conferencing SDKs for iOS, Android, Flutter, and React Native, making it easy to implement cross-platform video call functionality.

ZEGOCLOUD has announced a WebRTC UIKit SDK that is a brand-new pre-built UIKits and UI Component recently. Through it, We can complete the development of video calls, live streaming, video conference, and other scenarios within 10 minutes in low code.

As shown in the figure, WebRTC UIKit SDK is responsible for processing audio and video calls and the logic related to text chat. Include:

UI and interaction of the calling module
Call status management
Audio and video data transmission

You only need to implement business-related logic. For example:

User login registration
Friends List Management
Call billing recharge

Preparation for WebRTC SDK

A ZEGOCLOUD developer account–Sign up
The latest version of Chrome.
Basic understanding of Web development

ZEGOCLOUD SDK Integration for WebRTC Video Calling

Importer Call Kit SDK

Create a new html file and add the following code in the file.
Then, replace the appID and serverSecret parameters in the following code with the AppID and Server Secret of your project.

<html>
  <head>
    <style>
      #root {
        width: 100vw;
        height: 100vh;
      }
    </style>
  </head>

  <body>
    <div id="root"></div>
  </body>
  <script src="https://unpkg.com/@zegocloud/zego-uikit-prebuilt/zego-uikit-prebuilt.js"></script>
  <script>
    function getUrlParams(url = window.location.href) {
      let urlStr = url.split("?")[1];
      return new URLSearchParams(urlStr);
    }
    // Generate a Kit Token by calling a method.
    // @param 1: appID
    // @param 2: serverSecret
    // @param 3: Room ID
    // @param 4: User ID
    // @param 5: Username
    const roomID =
      getUrlParams().get("roomID") ||
      "room_" + Math.floor(Math.random() * 1000);
    const userID = Math.floor(Math.random() * 10000) + "";
    const userName = "userName" + userID;
    const appID = 221417685;
    const serverSecret = "be15e8ea06d70c26c704f87ed661b6aa";
    const kitToken = ZegoUIKitPrebuilt.generateKitTokenForTest(
      appID,
      serverSecret,
      roomID,
      userID,
      userName
    );

    const zp = ZegoUIKitPrebuilt.create(kitToken);
    zp.joinRoom({
      container: document.querySelector("#root"),
      sharedLinks: [
        {
          url:
            window.location.origin +
            window.location.pathname +
            "?roomID=" +
            roomID,
        },
      ],
      scenario: {
        mode: ZegoUIKitPrebuilt.OneONoneCallGroupCall,
      },
    });
  </script>
</html>

Run a Demo

Using the Web Server for Chrome plugin or any web server, start the html created in the previous step.

Group-call configuration

Group-call scenarios can be implemented by configuring the parameters of the joinRoom function.

Set scenario.mode to ZegoUIKitPrebuilt.GroupCall

// ...
zp.joinRoom({
        //...
        scenario: {
           mode: ZegoUIKitPrebuilt.GroupCall 
        },
        //...
});
//...

Audio-only call configuration

Audio-only call scenarios can also be implemented by configuring the parameters of the join room function.

Set the turnOnCameraWhenJoining to false to turn off the camera.
Set the showMyCameraToggleButton to false to hide the toggle button for enabling/disabling the camera.
Set the showAudioVideoSettingsButton to false to hide the advanced setting button for audio and video.
Set the showScreenSharingButton to false to hide the screen-sharing button.

// ....
zp.joinRoom({
     // ...,
    turnOnCameraWhenJoining: false,
    showMyCameraToggleButton: false,
    showAudioVideoSettingsButton: false,
    showScreenSharingButton: false; 
     // ...
});

Conclusion

We hope our article helped you understand the major points associated with a WebRTC video calling app. Wait no more! Using ZEGOCLOUD to start your video-calling app with the WebRTC development process today. We wish you all success!