MediaTrackSupportedConstraints: channelCount property
The MediaTrackSupportedConstraints
dictionary's
channelCount
property is a read-only Boolean value which
is present (and set to true
) in the object returned by
MediaDevices.getSupportedConstraints()
if and only if the
user agent supports the channelCount
constraint. If the
constraint isn't supported, it's not included in the list, so this value will never be
false
.
You can access the supported constraints dictionary by calling
navigator.mediaDevices.getSupportedConstraints()
.
Value
This property is present in the dictionary (and its value is always true
)
if the user agent supports the channelCount
constraint. If the property
isn't present, this property is missing from the supported constraints dictionary, and
you'll get undefined
if you try to look at its value.
Examples
const result = document.getElementById("result");
const supported = navigator.mediaDevices.getSupportedConstraints().channelCount;
result.textContent = supported ? "Supported!" : "Not supported!";
Result
Specifications
Specification |
---|
Media Capture and Streams # dom-mediatrackconstraintset-channelcount |
Browser compatibility
Report problems with this compatibility data on GitHubdesktop | mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
channelCount constraint |
Legend
Tip: you can click/tap on a cell for more information.
- Full support
- Full support
- No support
- No support