Web/API/MediaDevices/getSupportedConstraints

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.

Syntax

var supportedConstraints = navigator.mediaDevices.getSupportedConstraints();

Parameters

None.

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.

Example

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

HTML

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

<ul id="constraintList">
</ul>

CSS

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

JavaScript

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>";
    constraintList.appendChild(elem);
  }
}

Specifications

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

Browser compatibility

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
getSupportedConstraints	Chrome Full support 53	Edge Full support 12	Firefox Full support 44	IE No support No	Opera Full support 40	Safari Full support 11	WebView Android Full support 53	Chrome Android Full support 52	Firefox Android Full support 50	Opera Android Full support 41	Safari iOS Full support 11	Samsung Internet Android Full support 6.0

Legend

Full support  

Full support

No support  

No support

MediaDevices.getSupportedConstraints() by Mozilla Contributors is licensed under CC-BY-SA 2.5.