vitepress/docs/guide/frontmatter.md

# Frontmatter

Any Markdown file that contains a YAML frontmatter block will be processed by [gray-matter](https://github.com/jonschlinkert/gray-matter). The frontmatter must be at the top of the Markdown file, and must take the form of valid YAML set between triple-dashed lines. Example:

```md
---
title: Docs with VitePress
editLink: true
---
```

Between the triple-dashed lines, you can set [predefined variables](../config/frontmatter-config), or even create custom ones of your own. These variables can be used via the special <code>$frontmatter</code> variable.

Here's an example of how you could use it in your Markdown file:

```md
---
title: Docs with VitePress
editLink: true
---

# {{ $frontmatter.title }}

Guide content
```

## Alternative Frontmatter Formats

VitePress also supports JSON frontmatter syntax, starting and ending in curly braces:

```json
---
{
  "title": "Blogging Like a Hacker",
  "editLink": true
}
---
```