{"id":17680,"date":"2021-11-21T01:29:58","date_gmt":"2021-11-21T06:29:58","guid":{"rendered":"https:\/\/www.contus.com\/blog\/?p=17680"},"modified":"2026-04-17T02:10:34","modified_gmt":"2026-04-17T07:10:34","slug":"build-webrtc-video-chat-app-with-javascript","status":"publish","type":"post","link":"https:\/\/www.contus.com\/blog\/build-webrtc-video-chat-app-with-javascript\/","title":{"rendered":"How To Build A WebRTC Video Chat App With JavaScript?"},"content":{"rendered":"\r\n

\u201cWebRTC is estimated to grow at a CAGR of 34.37% with market value above $300 Billion by 2031\u201d<\/em><\/strong><\/em><\/strong><\/p>\r\n\r\n\r\n\r\n

In recent years, many companies have started to run their business online. And they are using video chat apps as an important tool to connect with clients and other businesses.<\/p>\r\n\r\n\r\n\r\n

If you are one such business or individual looking to create a video chat app, this article is for you. In this article, I will walk you through the steps to create a video chat app with JavaScript and WebRTC peer-to-peer connection.<\/p>\r\n\r\n\r\n\r\n

Let’s get started!<\/p>\r\n\r\n\r\n\r\n

<\/span>What is WebRTC?<\/strong><\/span><\/h2>\r\n\r\n\r\n\r\n

WebRTC is a framework that enables Real-Time Communications (RTC<\/em>) capabilities in browsers. It permits peer-to-peer communication<\/a> without any server. It allows a direct exchange of audio, video and chat data between clients.<\/p>\r\n\r\n\r\n\r\n

\"embed\r\n
WebRTC Video Conferencing Development<\/figcaption>\r\n<\/figure>\r\n\r\n\r\n\r\n

<\/span>Why WebRTC For Communication Apps?<\/strong><\/span><\/h2>\r\n\r\n\r\n\r\n

People use popular chat apps like Whatsapp, Signal and Telegram for business communication. But a dedicated e-conferencing app differs from a simple chat system<\/a> in different ways.<\/p>\r\n\r\n\r\n\r\n

To build one such app for your business, first you need to understand how video chat works.<\/p>\r\n\r\n\r\n\r\n

Let me explain this with a simple example. Imagine you are building a web video chat app<\/a>. Now, you’ll need 2 browsers (clients) – a caller and a callee. To connect the caller and callee devices, you need a server in-between. This server will be responsible for exchanging the messages between both browsers.<\/p>\r\n\r\n\r\n\r\n

In general, this is time consuming. Which means, the video\/ voice data has to travel from the caller client to the server. Then the server has to deliver the data to the callee client. This is a long process and there is a huge opportunity for your voice and video to delay.<\/p>\r\n\r\n\r\n\r\n

Imagine your users experiencing stutters and stammers on your app. Not welcome right?<\/p>\r\n\r\n\r\n\r\n

What if we remove the server and connect the browsers directly?<\/p>\r\n\r\n\r\n\r\n

This is exactly what WebRTC does in real-time video calls.<\/p>\r\n\r\n\r\n\r\n

WebRTC is a technology that connects your client apps without a server.<\/em><\/strong><\/p>\r\n\r\n\r\n\r\n

With WebRTC, the role of the server is very limited. Which means, it supports two browsers to discover each other and connect directly.<\/p>\r\n\r\n\r\n\r\n

So, can you build a web video app without WebRTC? Yes, but you might face typical issues like:<\/p>\r\n\r\n\r\n\r\n