From f5c3cb9145c267fabb679f273347fe4527cdbdbf Mon Sep 17 00:00:00 2001
From: Justin Oros <JustinOros@gmail.com>
Date: Wed, 20 May 2026 20:36:39 -0700
Subject: [PATCH] Resume AudioContext on visibilitychange to fix SFX on mobile
 after tab switch

---
 game.js | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/game.js b/game.js
index 6f1b069..3be3880 100644
--- a/game.js
+++ b/game.js
@@ -120,6 +120,13 @@ const SFX = (() => {
     return ctx;
   }
 
+  /* Resume AudioContext when user returns to the page on mobile */
+  document.addEventListener('visibilitychange', () => {
+    if (document.visibilityState === 'visible' && ctx && ctx.state === 'suspended') {
+      ctx.resume();
+    }
+  });
+
   /* Core: play a tone with envelope */
   function tone(freq, type, vol, attack, sustain, release, when) {
     const c   = getCtx();