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Showing content from https://developer.mozilla.org/en-US/docs/Web/API/MediaDeviceInfo/toJSON below:

MediaDeviceInfo: toJSON() method - Web APIs

Baseline Widely available

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.

None.

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

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:

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=" }

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