From 010b782a9665aadbde0e93b169f3311b9272bee3 Mon Sep 17 00:00:00 2001
From: Bruno Windels <brunow@element.io>
Date: Thu, 1 Apr 2021 14:59:18 +0200
Subject: [PATCH] allow t.map render fn to not return a dom node

---
 src/platform/web/ui/general/TemplateView.js | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/platform/web/ui/general/TemplateView.js b/src/platform/web/ui/general/TemplateView.js
index 6b016b9b..e82a492e 100644
--- a/src/platform/web/ui/general/TemplateView.js
+++ b/src/platform/web/ui/general/TemplateView.js
@@ -322,7 +322,11 @@ class TemplateBuilder {
     map(mapFn, renderFn) {
         return this.mapView(mapFn, mappedValue => {
             return new TemplateView(this._value, (t, vm) => {
-                return renderFn(mappedValue, t, vm);
+                const rootNode = renderFn(mappedValue, t, vm);
+                if (!rootNode) {
+                    return document.createComment("map placeholder");
+                }
+                return rootNode;
             });
         });
     }