rear camera does not work in chrome android web version

[rodrigoGA]

The rear camera does not work in android web version (tested on chrome and firefoxx)

I think the problem is related to this line

 constraints.video = { facingMode: 'environment' };

instead this example does work: https://jsfiddle.net/drbj820p/ I can't understand what the problem is

[rodrigoGA]

Attached screen of the compiled code, said line is not found in the version that is distributed

[naonvl]

any workaround on this?