The MediaDevices
method enumerateDevices()
requests a list of the available media input and output devices, such as microphones, cameras, headsets, and so forth. The returned Promise
is resolved with a MediaDeviceInfo
array describing the devices.
Syntax
var enumeratorPromise = navigator.mediaDevices.enumerateDevices();
Return value
A Promise
that receives an array of MediaDeviceInfo
objects when the promise is fulfilled. Each object in the array describes one of the available media input and output devices.
If enumeration fails, the promise is rejected.
Example
Here's an example of using enumerateDevices()
. It simply outputs a list of the device IDs, with their labels if available.
if (!navigator.mediaDevices || !navigator.mediaDevices.enumerateDevices) { console.log("enumerateDevices() not supported."); return; } // List cameras and microphones. navigator.mediaDevices.enumerateDevices() .then(function(devices) { devices.forEach(function(device) { console.log(device.kind + ": " + device.label + " id = " + device.deviceId); }); }) .catch(function(err) { console.log(err.name + ": " + err.message); });
This might produce:
videoinput: id = csO9c0YpAf274OuCPUA53CNE0YHlIr2yXCi+SqfBZZ8= audioinput: id = RKxXByjnabbADGQNNZqLVLdmXlS0YkETYCIbg+XxnvM= audioinput: id = r2/xw1xUPIyZunfV1lGrKOma5wTOvCkWfZ368XCndm0=
or if one or more MediaStream
s are active or persistent permissions are granted:
videoinput: FaceTime HD Camera (Built-in) id=csO9c0YpAf274OuCPUA53CNE0YHlIr2yXCi+SqfBZZ8= audioinput: default (Built-in Microphone) id=RKxXByjnabbADGQNNZqLVLdmXlS0YkETYCIbg+XxnvM= audioinput: Built-in Microphone id=r2/xw1xUPIyZunfV1lGrKOma5wTOvCkWfZ368XCndm0=
Specifications
Specification | Status | Comment |
---|---|---|
Media Capture and Streams The definition of 'mediaDevices: enumerateDevices' 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.
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
enumerateDevices | Chrome Full support 47 | Edge Full support 12 | 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 | Firefox Android
Full support
63
| Opera Android Full support 34 | Safari iOS Full support 11 | Samsung Internet Android Full support 5.0 |
Legend
- Full support
- Full support
- No support
- No support
- See implementation notes.
- See implementation notes.
- User must explicitly enable this feature.
- User must explicitly enable this feature.
See also
navigator.mediaDevices.getUserMedia()
- WebRTC - the introductory page to the API
- MediaStream API - the API for the media stream objects
- Taking webcam photos - a tutorial on using
getUserMedia()
for taking photos rather than video.