rehype-mdx-fenced-code-meta-support
v1.0.4
Published
A rehype MDX plugin for interpreting meta data tags passed to fenced code blocks in mdx.
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1,117
Maintainers
Readme
A rehype MDX plugin for adding metadata to code elements.
Table of Contents
Why
With the latest version of mdx-js, random props could not be fetched if they were in format below -
```mdx path=google.com src=no-src
# Heading 1
```
This was working in mdx v1. This package adds a new prop named metaData
for the fenced code blocks of the format path=google.com src=no-src
which can be parsed using a regex and accessed in your custom code component.
Installation
npm install rehype-mdx-fenced-code-meta-support
OR
yarn add rehype-mdx-fenced-code-meta-support
Usage
This plugin adds metadata to code elements in the MDX.
For example, given a file named example.mdx
with the following content:
```mdx path=google.com src=no-src
# Heading 1
```
The <code />
element now has a metaData
prop containing the path=google.com src=no-src
of the code block.
We are using this in gatsby with gatsby-plugin-mdx
plugin like this:
...
import rehypeAddCodeMetaData from 'rehype-mdx-fenced-code-meta-support';
...
{
resolve: `gatsby-plugin-mdx`,
options: {
mdxOptions: {
rehypePlugins: [rehypeAddCodeMetaData],
},
},
},
import React from 'react';
import { MDXProvider as Provider } from '@mdx-js/react';
const components = {
code: (props) => {
console.log("props", props);
const metaDataObject = props.metaData.split(' ').reduce((obj, item) => {
const [key, value] = item.split('=');
obj[key] = value;
return obj;
}, {});
return <Code {...props} path={metaDataObject.path} src={metaDataObject.src} />;
},
}
const MDXProvider = ({ components = components, element }) => (
<Provider components={{ ...components }}>
{element}
</Provider>
);
export default MDXProvider;
API
This package has a default export rehypeAddCodeMetaData
.
rehypeAddCodeMetaData
An MDX rehype plugin for adding metadata to code elements.
Compatibility
This plugin works with Node.js 16 or greater and MDX 3.