From 6e8701943c0bc573ffbe9ff02e8feec912caa118 Mon Sep 17 00:00:00 2001
From: bfs2021 <101915083+bfs2021@users.noreply.github.com>
Date: Thu, 22 Oct 2026 11:49:20 +0800
Subject: [PATCH] frontmatter: find a block list past blank and comment lines

A comment between a key and its block list made the look-ahead see the
comment, so the key stayed null and the first item errored as a list item
without a key. Skip blank and comment lines when looking for the list.

Fixes #84

Signed-off-by: bfs2021 <101915083+bfs2021@users.noreply.github.com>
---
 site/lib/frontmatter.mjs | 6 +++++-
 site/lib/lib.test.mjs    | 3 +++
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/site/lib/frontmatter.mjs b/site/lib/frontmatter.mjs
index 37af725..5d5fee7 100644
--- a/site/lib/frontmatter.mjs
+++ b/site/lib/frontmatter.mjs
@@ -85,7 +85,11 @@ export function parseFrontmatter(text) {
       return;
     }
     const value = parseScalar(line.slice(idx + 1));
-    const next = lines[i + 1];
+    let nextIndex = i + 1;
+    while (nextIndex < lines.length && (!lines[nextIndex].trim() || lines[nextIndex].trim().startsWith("#"))) {
+      nextIndex += 1;
+    }
+    const next = lines[nextIndex];
     if (value === null && next !== undefined && /^\s+-\s/.test(next)) {
       meta[key] = [];
       listKey = key;
diff --git a/site/lib/lib.test.mjs b/site/lib/lib.test.mjs
index f6b3cbc..d0b068d 100644
--- a/site/lib/lib.test.mjs
+++ b/site/lib/lib.test.mjs
@@ -485,6 +485,9 @@ const f1 = fm([
 eq("frontmatter undoes quote escapes", f1.meta.attribution_string, 'Music "{title}" by {artist}');
 eq("frontmatter keeps a quoted comma inside one list item", JSON.stringify(f1.meta.tags), JSON.stringify(["sci-fi, space", "ui", "it's"]));
 eq("frontmatter reads a block list", JSON.stringify(f1.meta.formats), JSON.stringify(["PNG", "SVG"]));
+const fComment = fm(["tags:", "  # content words only", "  - low-poly"]);
+eq("frontmatter reads a block list after a comment", JSON.stringify(fComment.meta.tags), JSON.stringify(["low-poly"]));
+eq("frontmatter has no errors for a list after a comment", fComment.errors.length, 0);
 eq("frontmatter reads booleans", f1.meta.commercial, true);
 eq("frontmatter has no errors on good input", f1.errors.length, 0);
 eq("frontmatter ignores a byte-order mark", parseFrontmatter("---\nid: a\n---\nB")?.meta.id, "a");