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The MediaDevices
interface 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.
Properties
Inherits properties from its parent EventTarget
.
Event handlers
MediaDevices.ondevicechange
- The event handler for the
devicechange
event. This event is delivered to theMediaDevices
object when a media input or output device is attached to or removed from the user's computer.
Methods
Inherits methods from its parent EventTarget
.
EventTarget.addEventListener()
- Registers an event handler to a specific event type.
MediaDevices.enumerateDevices()
- Obtains an array of information about the media input and output devices available on the system.
MediaDevices.getSupportedConstraints()
- Returns an object conforming to
MediaTrackSupportedConstraints
indicating which constrainable properties are supported on theMediaStreamTrack
interface. See Capabilities and constraints in Media Capture and Streams API (Media Stream) to learn more about constraints and how to use them. MediaDevices.getUserMedia()
- With the user's permission through a prompt, turns on a camera or screensharing and/or a microphone on the system and provides a
MediaStream
containing a video track and/or an audio track with the input. EventTarget.removeEventListener()
- Removes an event listener.
Example
'use strict'; // Put variables in global scope to make them available to the browser console. var video = document.querySelector('video'); var constraints = window.constraints = { audio: false, video: true }; var errorElement = document.querySelector('#errorMsg'); navigator.mediaDevices.getUserMedia(constraints) .then(function(stream) { var videoTracks = stream.getVideoTracks(); console.log('Got stream with constraints:', constraints); console.log('Using video device: ' + videoTracks[0].label); stream.onremovetrack = function() { console.log('Stream ended'); }; window.stream = stream; // make variable available to browser console video.srcObject = stream; }) .catch(function(error) { if (error.name === 'ConstraintNotSatisfiedError') { errorMsg('The resolution ' + constraints.video.width.exact + 'x' + constraints.video.width.exact + ' px is not supported by your device.'); } else if (error.name === 'PermissionDeniedError') { errorMsg('Permissions have not been granted to use your camera and ' + 'microphone, you need to allow the page access to your devices in ' + 'order for the demo to work.'); } errorMsg('getUserMedia error: ' + error.name, error); }); function errorMsg(msg, error) { errorElement.innerHTML += '<p>' + msg + '</p>'; if (typeof error !== 'undefined') { console.error(error); } }
Specifications
Specification | Status | Comment |
---|---|---|
Media Capture and Streams The definition of 'MediaDevices' in that specification. |
Candidate Recommendation | Initial definition |
Browser compatibility
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Update compatibility data on GitHub
Desktop | Mobile | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Basic support | Chrome Full support 47 | Edge Full support Yes | Firefox Full support 36 | IE No support No | Opera Full support 30 | Safari No support No | WebView Android Full support 47 | Chrome Android Full support 47 | Edge Mobile Full support Yes | Firefox Android Full support 36 | Opera Android Full support 30 | Safari iOS No support No | Samsung Internet Android ? |
ondevicechange | Chrome Full support 57 | Edge ? | Firefox
Full support
52
| IE ? | Opera Full support 34 | Safari No support No | WebView Android No support No | Chrome Android No support No | Edge Mobile ? | Firefox Android ? | Opera Android Full support 34 | Safari iOS No support No | Samsung Internet Android ? |
enumerateDevices | Chrome Full support 47 | Edge Full support Yes | Firefox
Full support
63
| IE No support No | Opera Full support 34 | Safari Full support 11 | WebView Android Full support 47 | Chrome Android Full support 47 | Edge Mobile Full support Yes | Firefox Android Full support 39 | Opera Android Full support 34 | Safari iOS Full support 11 | Samsung Internet Android ? |
getSupportedConstraints | Chrome Full support 53 | Edge ? | Firefox Full support 44 | IE ? | Opera Full support 40 | Safari Full support 11 | WebView Android Full support 53 | Chrome Android Full support 52 | Edge Mobile ? | Firefox Android Full support 50 | Opera Android Full support 40 | Safari iOS Full support 11 | Samsung Internet Android ? |
getDisplayMedia() | Chrome
Full support
70
| Edge Full support Yes | Firefox
No support
No
| IE No support No | Opera ? | Safari No support No | WebView Android Full support 70 | Chrome Android
Full support
70
| Edge Mobile Full support Yes | Firefox Android No support No | Opera Android ? | Safari iOS No support No | Samsung Internet Android ? |
getUserMedia | Chrome
Full support
52
| Edge Full support Yes | Firefox
Full support
36
| IE No support No | Opera
Full support
40
| Safari Full support 11 | WebView Android Full support 53 | Chrome Android
Full support
52
| Edge Mobile Full support Yes | Firefox Android
Full support
36
| Opera Android
Full support
40
| Safari iOS Full support 11 | Samsung Internet Android ? |
Stereo audio capture | Chrome ? | Edge ? | Firefox Full support 55 | IE No support No | Opera ? | Safari No support No | WebView Android ? | Chrome Android ? | Edge Mobile ? | Firefox Android No support No | Opera Android ? | Safari iOS No support No | Samsung Internet Android ? |
Legend
- Full support
- Full support
- No support
- No support
- Compatibility unknown
- Compatibility unknown
- See implementation notes.
- See implementation notes.
- User must explicitly enable this feature.
- User must explicitly enable this feature.
See also
- Media Capture and Streams API: The API this interface is part of.
- WebRTC API
Navigator.mediaDevices
: Returns a reference to aMediaDevices
object that can be used to access devices.- CameraCaptureJS: HTML5 video capture and playback using MediaDevices and the MediaStream Recording API (source on GitHub)
- OpenLang: HTML5 video language lab web application using MediaDevices and the MediaStream Recording API for video recording (source on GitHub)