The getSupportedConstraints() method of the MediaDevices interface returns an object based on the MediaTrackSupportedConstraints dictionary, whose member fields each specify one of the constrainable properties the user agent understands.


var supportedConstraints = navigator.mediaDevices.getSupportedConstraints();



Return value

A new object based on the MediaTrackSupportedConstraints 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 value true.


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

let constraintList = document.getElementById("constraintList");
let supportedConstraints = navigator.mediaDevices.getSupportedConstraints();

for (let constraint in supportedConstraints) {
  if (supportedConstraints.hasOwnProperty(constraint)) {
    let elem = document.createElement("li");
    elem.innerHTML = "<code>" + constraint + "</code>";



Specification Status Comment
Media Capture and Streams
The definition of 'getSupportedConstraints()' in that specification.
Candidate Recommendation Initial definition.

Browser compatibility

Update compatibility data on GitHub
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
getSupportedConstraintsChrome Full support 53Edge Full support 12Firefox Full support 44IE No support NoOpera Full support 40Safari Full support 11WebView Android Full support 53Chrome Android Full support 52Firefox Android Full support 50Opera Android Full support 41Safari iOS Full support 11Samsung Internet Android Full support 6.0


Full support Ā 
Full support
No support Ā 
No support