From a4cb4002dee90c501f67c0bef713e045303f37aa Mon Sep 17 00:00:00 2001
From: Rob Pilling <robpilling@gmail.com>
Date: Mon, 17 Jul 2023 20:06:32 +0100
Subject: [PATCH] Guard against Bangle.setUI({ <no mode> })

Following on from #2389, this makes it clear that while `setUI()`
can be used to reset the UI, `setUI({})` cannot, and must always
specify `mode` (amongst other options).
---
 libs/js/banglejs/Bangle_setUI_F18.js | 1 +
 libs/js/banglejs/Bangle_setUI_Q3.js  | 1 +
 2 files changed, 2 insertions(+)

diff --git a/libs/js/banglejs/Bangle_setUI_F18.js b/libs/js/banglejs/Bangle_setUI_F18.js
index 77c7a77837..6c34826247 100644
--- a/libs/js/banglejs/Bangle_setUI_F18.js
+++ b/libs/js/banglejs/Bangle_setUI_F18.js
@@ -3,6 +3,7 @@
   if ("object"==typeof mode) {
     options = mode;
     mode = options.mode;
+    if (!mode) throw new Error("Missing mode in setUI({...})");
   }
   var redraw = true;
   if (global.WIDGETS && WIDGETS.back) {
diff --git a/libs/js/banglejs/Bangle_setUI_Q3.js b/libs/js/banglejs/Bangle_setUI_Q3.js
index f5d3332493..4fd1c4c461 100644
--- a/libs/js/banglejs/Bangle_setUI_Q3.js
+++ b/libs/js/banglejs/Bangle_setUI_Q3.js
@@ -3,6 +3,7 @@
   if ("object"==typeof mode) {
     options = mode;
     mode = options.mode;
+    if (!mode) throw new Error("Missing mode in setUI({...})");
   }
   var redraw = true;
   if (global.WIDGETS && WIDGETS.back) {