Use the same template for taglists and the blog index. Move the tagposts into a collection to make life easier

src/feeds/tags/atom.njk

@@ -23,7 +23,7 @@ eleventyImport:
     <uri>{{ metadata.site.url }}</uri>
   </author>
   <category term="{{ tag }}" />
-  {%- for post in collections.posts | filterBy(tag) | reverse %}
+  {%- for post in collections.tagPosts[tag] %}
   {%- set absolutePostUrl = post.url | absoluteUrl(metadata.site.url) %}
   <entry>
     <title>{{ post.data.title }}</title>

src/feeds/tags/json.njk

@@ -21,7 +21,7 @@ eleventyImport:
     "url": "{{ metadata.site.url }}"
   },
   "items": [
-    {%- for post in collections.posts | filterBy(tag) | reverse %}
+    {%- for post in collections.tagPosts[tag] %}
     {%- set absolutePostUrl = post.url | absoluteUrl(metadata.site.url) %}
     {
       "id": "{{ absolutePostUrl }}",

src/feeds/tags/rss.njk

@@ -18,8 +18,7 @@ eleventyImport:
     <atom:link href="{{ permalink | absoluteUrl(metadata.site.url) }}" rel="self" type="application/rss+xml" />
     <description>Posts tagged #{{ tag }}</description>
     <language>{{ metadata.site.language }}</language>
-    {% set posts = collections.posts | filterBy(tag) | reverse %}
-    {%- for post in posts %}
+    {%- for post in collections.tagPosts[tag] %}
     {%- set absolutePostUrl = post.url | absoluteUrl(metadata.site.url) %}
     <item>
       <title>{{ post.data.title }}</title>