document.addEventListener('DOMContentLoaded', function () {

const video = document.querySelector('#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: {} }).then(function (stream) {

video.srcObject = stream

})

}

video.addEventListener('play', () => {

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)

})

})