MediaDevices

Baseline Widely available *

This feature is well established and works across many devices and browser versions. It’s been available across browsers since September 2017.

* Some parts of this feature may have varying levels of support.

Secure context: This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.

The MediaDevices interface of the Media Capture and Streams API provides access to connected media input devices like cameras and microphones, as well as screen sharing. In essence, it lets you obtain access to any hardware source of media data.

EventTarget MediaDevices

Instance properties

Inherits properties from its parent interface, EventTarget.

Instance methods

Inherits methods from its parent interface, EventTarget.

enumerateDevices()

Obtains an array of information about the media input and output devices available on the system.

getSupportedConstraints()

Returns an object conforming to MediaTrackSupportedConstraints indicating which constrainable properties are supported on the MediaStreamTrack interface. See Media Streams API to learn more about constraints and how to use them.

getDisplayMedia()

Prompts the user to select a display or portion of a display (such as a window) to capture as a MediaStream for sharing or recording purposes. Returns a promise that resolves to a MediaStream.

getUserMedia()

With the user's permission through a prompt, turns on a camera and/or a microphone on the system and provides a MediaStream containing a video track and/or an audio track with the input.

selectAudioOutput() Experimental

Prompts the user to select a specific audio output device.

Events

devicechange

Fired when a media input or output device is attached to or removed from the user's computer.

Example

js
// Put variables in global scope to make them available to the browser console.
const video = document.querySelector("video");
const constraints = {
  audio: false,
  video: true,
};

navigator.mediaDevices
  .getUserMedia(constraints)
  .then((stream) => {
    const videoTracks = stream.getVideoTracks();
    console.log("Got stream with constraints:", constraints);
    console.log(`Using video device: ${videoTracks[0].label}`);
    stream.onremovetrack = () => {
      console.log("Stream ended");
    };
    video.srcObject = stream;
  })
  .catch((error) => {
    if (error.name === "OverconstrainedError") {
      console.error(
        `The resolution ${constraints.video.width.exact}x${constraints.video.height.exact} px is not supported by your device.`,
      );
    } else if (error.name === "NotAllowedError") {
      console.error(
        "You need to grant this page permission to access your camera and microphone.",
      );
    } else {
      console.error(`getUserMedia error: ${error.name}`, error);
    }
  });

Specifications

Specification
Media Capture and Streams
# mediadevices

Browser compatibility

Report problems with this compatibility data on GitHub
desktopmobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
MediaDevices
devicechange event
enumerateDevices
getDisplayMedia()
Audio capture support
controller option
Experimental
monitorTypeSurfaces option
Experimental
preferCurrentTab option
ExperimentalNon-standard
selfBrowserSurface option
Experimental
surfaceSwitching option
Experimental
systemAudio option
Experimental
getSupportedConstraints
getUserMedia
Secure context required
selectAudioOutput
Experimental
setCaptureHandleConfig
Experimental

Legend

Tip: you can click/tap on a cell for more information.

Full support
Full support
Partial support
Partial support
No support
No support
Experimental. Expect behavior to change in the future.
Non-standard. Check cross-browser support before using.
See implementation notes.
Has more compatibility info.

See also