i use navigator.mediaDevices.getUserMedia to wake up camera, when i use constraint with '{video:{facingMode: {exact: 'user'}}}'，occur a error"invalid constraint"
WebRtc choose front camera do not success
https://jsfiddle.net/evy93857/ works for me locally. Can you give more details like a test page and the device you are testing on? Alternatively, you can file a bug in https://bugs.webkit.org