MediaDevices: getSupportedConstraints() 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 insecure contexts (HTTPS), in some or allsupporting browsers.

ThegetSupportedConstraints() method of theMediaDevices interface returns an object based on theMediaTrackSupportedConstraints dictionary, whose member fields each specify one of the constrainable properties theuser agent understands.

Syntax

getSupportedConstraints()

Parameters

None.

Return value

A new object based on theMediaTrackSupportedConstraints dictionary listing the constraints supported by the user agent.Because only constraints supported by the user agent are included in the list, each of these Boolean properties has the valuetrue.

Examples

This example outputs a list of the constraints supported by your browser.

<p>The following media constraints are supported by your browser:</p><ul></ul>

body {  font:    15px "Arial",    sans-serif;}

const constraintList = document.querySelector("#constraintList");const supportedConstraints = navigator.mediaDevices.getSupportedConstraints();for (const constraint of Object.keys(supportedConstraints)) {  const elem = document.createElement("li");  elem.appendChild(document.createElement("code")).textContent = constraint;  constraintList.appendChild(elem);}