From 8d7a1635f92712e0db064f8b8ee1f8edc36b188e Mon Sep 17 00:00:00 2001
From: Claude <noreply@anthropic.com>
Date: Fri, 14 Nov 2025 03:10:05 +0000
Subject: [PATCH] fix: prevent ReferenceError when loading maps before style.js
 loads

Check if heightmapColorSchemes is defined before accessing it to
prevent race condition between load.js and style.js initialization.
---
 modules/io/load.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/modules/io/load.js b/modules/io/load.js
index ccfccecb..7692622e 100644
--- a/modules/io/load.js
+++ b/modules/io/load.js
@@ -477,7 +477,7 @@ async function parseLoadedData(data, mapVersion) {
     }
 
     // add custom heightmap color scheme if any
-    if (heightmapColorSchemes) {
+    if (typeof heightmapColorSchemes !== "undefined" && heightmapColorSchemes) {
       const oceanScheme = byId("oceanHeights")?.getAttribute("scheme");
       if (oceanScheme && !(oceanScheme in heightmapColorSchemes)) addCustomColorScheme(oceanScheme);
       const landScheme = byId("#landHeights")?.getAttribute("scheme");