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); } }
Result
Specifications
Specification | Status | Comment |
---|---|---|
Media Capture and Streams The 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.
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
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