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MediaDevices.getUserMedia() getUserMedia() MediaStream Promise

navigator.mediaDevices.getUserMedia({ video: true }).then((mediaStream) => {
  // 
});

MediaStream.getVideoTracks() MediaStreamTrack MediaStreamTrack MediaStreamTrack

const track = mediaStream.getVideoTracks()[0];

applyConstraints()

let zoom = document.querySelector("#zoom");
const capabilities = track.getCapabilities();
// 
if (!capabilities.zoom) {
  return;
}
track.applyConstraints({ advanced: [{ zoom: zoom.value }] });

MediaStreamTrack ImageCapture() MediaStream MediaStreamTrack.kind "video"ImageCapture NotSupportedError DOMException

let imageCapture = new ImageCapture(track);

ImageCapture: MediaStreamTrack


MediaStream Image Capture # imagecaptureapi

MediaStream
MediaStreamTrack

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API
1. ImageCapture

API

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