Default to always using Back camera

[BB-Dev-SA]

Hello there,

I want to have the default camera set as the back camera, however I've been struggling with getting it to work. Trying to using [ facingMode: "environment" ] just doesn't seem to work. Here's my current setup:

                                      docReady(function() {
                                        var resultContainer = document.getElementById('qr-reader-results');
                                        var lastResult, countResults = 0;

                                        function onScanSuccess(decodedText, decodedResult) {
                                            if (decodedText !== lastResult) {
                                                ++countResults;
                                                lastResult = decodedText;
                                                document.getElementById("barcodeScanInput").value = decodedText;
                                            }
                                        }


                                        var html5QrcodeScanner = new Html5QrcodeScanner(
                                            "qr-reader", {
                                                fps: 10,
                                                qrbox: 250,
                                                rememberLastUsedCamera: true
                                            });
                                        html5QrcodeScanner.render(onScanSuccess);
                                    });

Hopefully someone can tell me how I would correctly implement the facingMode to this code. Thanks in advance.