html: isBlank: Tag.normalize(template) to detect onlyIfContent

1 files changed, 5 insertions, 1 deletions

diff --git a/src/html.js b/src/html.js
index 49700775..3bec4269 100644
--- a/src/html.js
+++ b/src/html.js
@@ -223,7 +223,11 @@ export function isBlank(content) {
     // could include content. These need to be checked too.
     // Check each of the templates one at a time.
     for (const template of result) {
-      const content = template.content;
+      // Resolve the content all the way down to a tag -
+      // if it's a template that returns another template,
+      // that won't do, because we need to detect if its
+      // final content is a tag marked onlyIfSiblings.
+      const content = normalize(template);
 
       if (content instanceof Tag && content.onlyIfSiblings) {
         continue;