gatsby-transformer-remark-frontmatter

Allows querying Markdown frontmatter fields as markdown. Currently only works on top-level string typed keys in the frontmatter, but support for string fields in objects or lists can be added if people ask for it enough or someone submits a pull request.

Install

npm i gatsby-transformer-remark-frontmatter

How to use

// in your gatsby-config.js
plugins: [
  'gatsby-transformer-remark',
  'gatsby-transformer-remark-frontmatter'
]

Add the @md directive to fields in your GraphQL schema that you want to parse as Markdown.

Example

Given the following markdown file

---
templateKey: index-template
sidebar: |
  # Some Markdown Content
  ![My Fancy Image](../image.png)
list:
  - item: |
     # Currently Supported
---

# Main Content

Some Text

The following GraphQL schema can be combined with the query below to get the body content and the sidebar markdown as html.

Schema:

type ListItem {
  item: String @md
}
type Frontmatter @infer {
  sidebar: String @md
  list: [ListItem!]
}
type MarkdownRemark implements Node @infer {
  frontmatter: Frontmatter!
}

Query:

query {
  allMarkdownRemark(filter: { frontmatter: { templateKey: { eq: "index-template" } } }) {
    html
    frontmatter {
      templateKey
      sidebar {
        html
      }
      list {
        item {
          html
        }
      }
    }
  }
}

Possible Issues

Many plugins expect all MarkdownRemark nodes to have File node parents. This plugin passes data through those plugins, but at the moment doesn't link the parent node to the original file. This may cause some plugins that depend on MarkdownRemark parents to fail (such as gatsby-remark-images).