From 2c69b0c97d40f76363d20478cb799ce4b7518e56 Mon Sep 17 00:00:00 2001
From: Jacky Zhao <j.zhao2k19@gmail.com>
Date: Fri, 8 Dec 2023 16:55:40 -0800
Subject: [PATCH] fix: frontmatter coercion (empty string is falsy)

---
 quartz/plugins/transformers/frontmatter.ts | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/quartz/plugins/transformers/frontmatter.ts b/quartz/plugins/transformers/frontmatter.ts
index 017d3d1f1..6498a070c 100644
--- a/quartz/plugins/transformers/frontmatter.ts
+++ b/quartz/plugins/transformers/frontmatter.ts
@@ -37,16 +37,16 @@ export const FrontMatter: QuartzTransformerPlugin<Partial<Options> | undefined>
             })
 
             // tag is an alias for tags
-            if (data.tag) {
-              data.tags = data.tag
+            if (data.tag !== null) {
+              data.tags = data.tag.toString()
             }
 
             // coerce title to string
-            if (data.title) {
+            if (data.title !== null) {
               data.title = data.title.toString()
             }
 
-            if (data.tags && !Array.isArray(data.tags)) {
+            if (data.tags !== null && !Array.isArray(data.tags)) {
               data.tags = data.tags
                 .toString()
                 .split(oneLineTagDelim)