docs(open_graph): add a og:locale notice

hexojs/hexo#3808
SukkaW · Dec 1, 2019 · 10d10a4 · 10d10a4
1 parent 581a427
commit 10d10a4
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/source/docs/helpers.md b/source/docs/helpers.md
@@ -794,6 +794,10 @@ Option | Description | Default
 `updated` | Article modified time | `page.updated` if existed
 `language` | Article language | `page.lang` or `config.language`
 
+{% note warn %}
+`og:locale` tag won't be added if given `language` is not in 'language_TERRITORY' format. [`og:locale` documents](https://ogp.me/#optional).
+{% endnote %}
+
 ### toc
 
 Parses all heading tags (h1~h6) in the content and inserts a table of contents.