MediaDeviceInfo: toJSON() method

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.

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

The toJSON() method of the MediaDeviceInfo interface is a serializer; it returns a JSON representation of the MediaDeviceInfo object.

Syntax

js
toJSON()

Parameters

None.

Return value

A JSON object that is the serialization of the MediaDeviceInfo object.

Examples

js
if (!navigator.mediaDevices || !navigator.mediaDevices.enumerateDevices) {
  console.log("enumerateDevices() not supported.");
} else {
  // List cameras and microphones.
  navigator.mediaDevices
    .enumerateDevices()
    .then((devices) => {
      devices.forEach((device) => {
        console.log(device.toJSON());
      });
    })
    .catch((err) => {
      console.log(`${err.name}: ${err.message}`);
    });
}

This might produce:

bash
Object { deviceId: "HJtTemQTM64Bivxv3ZEyKjCi1VR8042lPNpmXKObKJE=", kind: "videoinput", label: "", groupId: "Okm2l1YZTrwy8awTxE8QSLNFoVMdIXx++wLh68tbmv0=" }
Object { deviceId: "EqDubLxPlPeW+5w/ereWTF/3EaAMVHh9QBBHkZHiP0k=", kind: "audioinput", label: "", groupId: "Okm2l1YZTrwy8awTxE8QSLNFoVMdIXx++wLh68tbmv0=" }
Object { deviceId: "CanWttL2RnHOiS7FzzYXMIvLqVFE5S06Lfy8H//nhEw=", kind: "audioinput", label: "", groupId: "nOdLNeXGIw9oL9f2wH69SssQpRVs7cmt9jqZrUWgQwI=" }

Specifications

Specification
Media Capture and Streams
# dom-mediadeviceinfo-tojson

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
toJSON()

Legend

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

Full support
Full support

See also