From cfa870f060934c4738c2f70e7b21ad13b6acdb42 Mon Sep 17 00:00:00 2001
From: Mathieu POUSSE <mathieu-pousse@users.noreply.github.com>
Date: Thu, 20 Jul 2023 09:14:53 +0200
Subject: [PATCH] fix(theme): support missing meta description tag (#2639)

---
 src/client/app/composables/head.ts | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/src/client/app/composables/head.ts b/src/client/app/composables/head.ts
index 5dc1a4fb..d52d3986 100644
--- a/src/client/app/composables/head.ts
+++ b/src/client/app/composables/head.ts
@@ -37,9 +37,15 @@ export function useUpdateHead(route: Route, siteDataByRouteRef: Ref<SiteData>) {
     // update title and description
     document.title = createTitle(siteData, pageData)
 
-    document
-      .querySelector(`meta[name=description]`)!
-      .setAttribute('content', pageDescription || siteData.description)
+    const description = pageDescription || siteData.description
+    let metaDescriptionElement = document.querySelector(
+      `meta[name=description]`
+    )
+    if (metaDescriptionElement) {
+      metaDescriptionElement.setAttribute('content', description)
+    } else {
+      createHeadElement(['meta', { name: 'description', content: description }])
+    }
 
     updateHeadTags(
       mergeHead(siteData.head, filterOutHeadDescription(frontmatterHead))