From 136fe914c441b4f77d0abd0b125c3cde3e5cea67 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Stephan=20B=C3=B6sch-Plepelits?= <skunk@xover.mud.at>
Date: Wed, 19 Aug 2020 17:26:04 +0200
Subject: [PATCH] Twig filter 'enumerate': return '' for null input

---
 src/twigFunctions.js | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/twigFunctions.js b/src/twigFunctions.js
index 3b5be8b1..d774e3d1 100644
--- a/src/twigFunctions.js
+++ b/src/twigFunctions.js
@@ -94,6 +94,10 @@ OverpassLayer.twig.extendFunction('evaluate', function (tags) {
   return d
 })
 function enumerate (list) {
+  if (!list) {
+    return ''
+  }
+
   if (typeof list === 'string') {
     list = list.split(/;/g)
   }