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 ⁨October 2018⁩.

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

toJSON()

Parameters

None.

Return value

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

Examples

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=" }