From 5b5102f909b7f869ec7cb2189d6a5ce15a2749e4 Mon Sep 17 00:00:00 2001
From: Yohan Boniface <yohanboniface@free.fr>
Date: Tue, 8 Apr 2025 15:21:27 +0200
Subject: [PATCH] fix: fix categorized layer crashing with null value

Do not call toString on a null value
---
 umap/static/umap/js/modules/utils.js | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/umap/static/umap/js/modules/utils.js b/umap/static/umap/js/modules/utils.js
index 625674da..d80df511 100644
--- a/umap/static/umap/js/modules/utils.js
+++ b/umap/static/umap/js/modules/utils.js
@@ -283,6 +283,8 @@ export function greedyTemplate(str, data, ignore) {
 }
 
 export function naturalSort(a, b, lang) {
+  a ??= ''
+  b ??= ''
   return a
     .toString()
     .toLowerCase()