const video = document.getElementById("video");

Promise.all([

faceapi.nets.tinyFaceDetector.loadFromUri("/models"),

faceapi.nets.faceLandmark68Net.loadFromUri("/models"),

faceapi.nets.faceRecognitionNet.loadFromUri("/models"),

faceapi.nets.faceExpressionNet.loadFromUri("/models"),

]).then(startVideo);

function startVideo() {

navigator.mediaDevices

.getUserMedia({ video: true })

.then(function (stream) {

video.srcObject = stream;

})

.catch(function (err) {

console.log(err);

});

}

video.addEventListener("playing", () => {

const canvas = faceapi.createCanvasFromMedia(video);

document.body.append(canvas);

const displaySize = { width: video.width, height: video.height };

faceapi.matchDimensions(canvas, displaySize);

setInterval(async () => {

const detections = await faceapi

.detectAllFaces(video, new faceapi.TinyFaceDetectorOptions())

.withFaceLandmarks()

.withFaceExpressions();

const resizedDetections = faceapi.resizeResults(detections, displaySize);

canvas.getContext("2d").clearRect(0, 0, canvas.width, canvas.height);

faceapi.draw.drawDetections(canvas, resizedDetections);

faceapi.draw.drawFaceLandmarks(canvas, resizedDetections);

faceapi.draw.drawFaceExpressions(canvas, resizedDetections);

}, 100);

});