Introduction to AdapterJS
AdapterJS is a powerful JavaScript library designed to make WebRTC development easier by abstracting browser differences and providing a unified API. Whether you are developing real-time communication applications or video conferencing tools, AdapterJS simplifies the process by ensuring that your code works consistently across various browsers.
Getting Started with AdapterJS
To get started with AdapterJS, you can include it in your project via CDN:
<script src="https://cdn.jsdelivr.net/npm/adapterjs@latest/adapter.min.js"></script>Example APIs in AdapterJS
Creating a Peer Connection
One of the core functionalities of WebRTC is establishing a peer-to-peer connection. Here’s how you can do it using AdapterJS:
const configuration = {
iceServers: [{
urls: 'stun:stun.l.google.com:19302'
}]
};
const peerConnection = new RTCPeerConnection(configuration);
peerConnection.onicecandidate = function(event) {
if (event.candidate) {
console.log('New ICE candidate: ', event.candidate);
}
};
peerConnection.ontrack = function(event) {
const remoteVideo = document.getElementById('remoteVideo');
remoteVideo.srcObject = event.streams[0];
};Creating an Offer
Creating an offer is the first step in establishing a connection:
peerConnection.createOffer().then(offer => {
return peerConnection.setLocalDescription(offer);
}).then(() => {
// Send the offer to the remote peer through your signaling server
}).catch(error => {
console.error('Error creating offer: ', error);
});Handling ICE Candidates
Handling ICE candidates is crucial for establishing a connection:
function handleICECandidate(event) {
if (event.candidate) {
// Send the ICE candidate to the remote peer via your signaling server
}
}
peerConnection.onicecandidate = handleICECandidate;Creating an Answer
The remote peer responds to the offer by creating an answer:
peerConnection.setRemoteDescription(new RTCSessionDescription(offer)).then(() => {
return peerConnection.createAnswer();
}).then(answer => {
return peerConnection.setLocalDescription(answer);
}).then(() => {
// Send the answer to the remote peer via your signaling server
}).catch(error => {
console.error('Error creating answer: ', error);
});Adding Media Tracks
Adding media tracks to the peer connection allows you to stream audio or video:
navigator.mediaDevices.getUserMedia({ video: true, audio: true }).then(stream => {
stream.getTracks().forEach(track => {
peerConnection.addTrack(track, stream);
});
const localVideo = document.getElementById('localVideo');
localVideo.srcObject = stream;
}).catch(error => {
console.error('Error accessing media devices: ', error);
});Example Application Using AdapterJS
Here is a simple example of a video chat application using AdapterJS:
<!DOCTYPE html>
<html>
<head>
<title>Video Chat with AdapterJS</title>
<script src="https://cdn.jsdelivr.net/npm/adapterjs@latest/adapter.min.js"></script>
</head>
<body>
<video id="localVideo" autoplay muted></video>
<video id="remoteVideo" autoplay></video>
<script>
const configuration = { iceServers: [{ urls: 'stun:stun.l.google.com:19302' }] };
const peerConnection = new RTCPeerConnection(configuration);
peerConnection.onicecandidate = function(event) {
if (event.candidate) {
// Send the ICE candidate to the remote peer
}
};
peerConnection.ontrack = function(event) {
document.getElementById('remoteVideo').srcObject = event.streams[0];
};
navigator.mediaDevices.getUserMedia({ video: true, audio: true }).then(stream => {
document.getElementById('localVideo').srcObject = stream;
stream.getTracks().forEach(track => {
peerConnection.addTrack(track, stream);
});
return peerConnection.createOffer();
}).then(offer => {
return peerConnection.setLocalDescription(offer);
}).then(() => {
// Send the offer to the remote peer
}).catch(error => {
console.error('Error: ', error);
});
</script>
</body>
</html>
This example demonstrates how to set up a basic video chat application using AdapterJS. It captures video from the user’s camera, streams it, and displays the remote video stream in the browser.
Hash: 766142ae45d9b4bf5e189216d048f5b0ad9469e20e0b8ec708d112b14c80801e
