From 2d7ff417fcd93413262284555e3e5f4341bb27c9 Mon Sep 17 00:00:00 2001
From: "Dustin C. Hatch" <dustin@hatch.name>
Date: Sat, 8 Mar 2025 20:10:50 -0600
Subject: [PATCH] ui: Select environment camera if possible

Apparently, Firefox/Android defaults to using the front camera, and
does not provide any native UI for selecting a different one.  We can
request the back camera by indiciting that the "environment" camera is
"ideal."
---
 js/transaction.ts | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/js/transaction.ts b/js/transaction.ts
index ef09ed7..c373dab 100644
--- a/js/transaction.ts
+++ b/js/transaction.ts
@@ -57,7 +57,11 @@ async function startCamera() {
     let stream: MediaStream;
     try {
         stream = await navigator.mediaDevices.getUserMedia({
-            video: true,
+            video: {
+                facingMode: {
+                    ideal: "environment",
+                },
+            },
             audio: false,
         });
     } catch (ex) {