Goodnight M
I use a webrtc application and I want to switch between the two cameras but when I try to activate, nothing happens and the camera is not displayed

function broadcastNewCameraTracks(stream, type, mirrorMode = true) {

                    h.setLocalStream(stream, mirrorMode);

                    let track = type == 'audio' ? stream.getAudioTracks()[0] : s                    tream.getVideoTracks()[0];

            
                    for (let p in pc) {
                            if (pc.hasOwnProperty(p)) {
                                let pName = pc[p];
                    
                                if (typeof pName == 'object' && pName.replaceTrack) {
                                    pName.replaceTrack(track);
                                }
                            }
                        }

}

document.getElementById(‘camera-rotate’).addEventListener(‘click’, async (e) => {
e.preventDefault();

                    let elem = document.getElementById('camera-rotate');
                    let usingRearCamera = elem.getAttribute('data-using-rear-camera') === 'true';
                    let onPath = elem.querySelector('path.on');
                    let offPath = elem.querySelector('path.off');

                    if (myStream) {
                            myStream.getTracks().forEach(track => track.stop());
                    }

                    try {

                            const desiredCamera = usingRearCamera ? "user" : "environment";


                            if (desiredCamera) {

                                    const constraints = {
                                            video: {
                                                    // width: { max: 800 },
                                                    // height: { max: 720 },
                                                    // frameRate: { ideal: 15 },
                                                    // bitrate: 500000, // Réduire le débit binaire à 500 Kbps
                                                    facingMode: { ideal: desiredCamera } // Utilisez 'ideal' pour éviter les erreurs si la caméra n'est pas disponible
                                            },
                                            audio: true // Optionnel, si vous avez besoin de l'audio aussi
                                    };

                                    const stream = await navigator.mediaDevices.getUserMedia(constraints);

                                    myStream = stream;

                                    // Diffuse les nouvelles pistes vidéo et audio
                                    broadcastNewCameraTracks(myStream, 'video', true);

                                    // Met à jour l'état de la caméra et l'interface utilisateur
                                    usingRearCamera = !usingRearCamera;
                                    elem.setAttribute('data-using-rear-camera', usingRearCamera);

                                    if (usingRearCamera) {
                                            onPath.classList.remove('on');
                                            onPath.classList.add('off');
                                            offPath.classList.remove('off');
                                            offPath.classList.add('on');
                                            elem.classList.add('camera-off');
                                            elem.setAttribute('title', 'Activer la caméra avant');
                                    } else {

                                            onPath.classList.remove('off');
                                            onPath.classList.add('on');
                                            offPath.classList.remove('on');
                                            offPath.classList.add('off');

                                            elem.setAttribute('title', 'Deactivate Rear Camera');
                                            elem.classList.remove('camera-off');

                                    }

                            } else {
                                    console.error('No appropriate camera found.');
                            }
                    } catch (error) {
                            console.error('Error accessing camera:', error);
                    }
            });