3 files changed, 27 insertions, 1 deletions
diff --git a/vhosts/blog/nuldoc-src/components/page_layout.ts b/vhosts/blog/nuldoc-src/components/page_layout.ts
index 50ed45de..5582c405 100644
--- a/vhosts/blog/nuldoc-src/components/page_layout.ts
+++ b/vhosts/blog/nuldoc-src/components/page_layout.ts
@@ -44,6 +44,26 @@ export async function pageLayout(
         metaKeywords.join(","),
       ]]),
     ]),
+    metaElement([
+      ["property", "og:type"],
+      ["content", "article"],
+    ]),
+    metaElement([
+      ["property", "og:title"],
+      ["content", metaTitle],
+    ]),
+    metaElement([
+      ["property", "og:description"],
+      ["content", metaDescription],
+    ]),
+    metaElement([
+      ["property", "og:site_name"],
+      ["content", config.blog.siteName],
+    ]),
+    metaElement([
+      ["property", "og:locale"],
+      ["content", "ja_JP"],
+    ]),
     linkElement("icon", "/favicon.svg", "image/svg+xml"),
     el("title", [], text(metaTitle)),
     await stylesheetLinkElement("/style.css", config),
diff --git a/vhosts/blog/nuldoc-src/pages/not_found.ts b/vhosts/blog/nuldoc-src/pages/not_found.ts
index a1b6109b..e7eb28d0 100644
--- a/vhosts/blog/nuldoc-src/pages/not_found.ts
+++ b/vhosts/blog/nuldoc-src/pages/not_found.ts
@@ -33,7 +33,7 @@ export async function generateNotFoundPage(
   const html = await pageLayout(
     {
       metaCopyrightYear: config.blog.siteCopyrightYear,
-      metaDescription: "リクエストされたページが見つかりません。",
+      metaDescription: "リクエストされたページが見つかりません",
       metaKeywords: [],
       metaTitle: `Page Not Found | ${config.blog.siteName}`,
       requiresSyntaxHighlight: false,
diff --git a/vhosts/blog/nuldoc-src/renderers/html.ts b/vhosts/blog/nuldoc-src/renderers/html.ts
index d3cd9893..df211000 100644
--- a/vhosts/blog/nuldoc-src/renderers/html.ts
+++ b/vhosts/blog/nuldoc-src/renderers/html.ts
@@ -245,6 +245,12 @@ function getElementAttributes(e: Element): [string, string][] {
           if (a[0] === "name" && b[0] === "content") {
             return -1;
           }
+          if (a[0] === "content" && b[0] === "property") {
+            return 1;
+          }
+          if (a[0] === "property" && b[0] === "content") {
+            return -1;
+          }
         }
         if (e.name === "link") {
           if (a[0] === "href" && b[0] === "rel") {