Support draft/hidden posts (#2049)

* support draft/hidden posts

* add changeset

---------

Co-authored-by: Dimitri POSTOLOV <[email protected]>
Co-authored-by: Dimitri POSTOLOV <[email protected]>

Author: 3 people

.changeset/warm-pens-travel.md

@@ -0,0 +1,5 @@
+---
+'nextra-theme-blog': minor
+---
+
+support draft posts via frontMatter's `draft: true` value

examples/blog/pages/posts/draft.mdx

@@ -0,0 +1,13 @@
+---
+title: Draft
+date: 2023/6/28
+description: An example of a draft post.
+draft: true
+tag: web development
+author: Ada Lovelace
+---
+
+Because this post has `draft: true` defined in its frontmatter, it won't show up
+in the [list of posts](/posts) or
+[list of posts by tag](/tags/web%20development) but can be access directly by
+its url at [/posts/draft](/posts/draft).

packages/nextra-theme-blog/src/utils/collect.ts

@@ -14,8 +14,8 @@ const isPost = (page: PageMapItem): page is MdxFile => {
     page.name.startsWith('_')
   )
     return false
-  const type = page.frontMatter?.type
-  return !type || type === 'post'
+  const { draft, type } = page.frontMatter || {}
+  return !draft && (!type || type === 'post')
 }
 
 export const collectPostsAndNavs = ({ opts }: LayoutProps) => {