Parse HAST node as a custom preact component | Astro Lounge | Page 1

tough hawk Jun 6, 2025, 11:24 AM

Heyo,

I've been working on a project to support some custom markdown syntax which will be rendered as a custom preact component.

I've done the steps in remark and the remarkRehype stages, so now I have my markdown content wrapped in §§[content]§§ properly marked by HTML elements <inline-redactions>[content]</inline-redaction>

Though, now I need to tell rehype to parse those elements as a custom preact component InlineRedaction.tsx.
I've gotten so far that I probably need the rehype-react plugin. But I'm struggling to configure it properly.

Does anyone have experience with the plugin or this use case? I'd very much appreciate some pointers here.

tribal schoonerBOT Jun 6, 2025, 11:24 AM

Hi @tough hawk. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave:

I'm sorry, but the knowledge sources provided do not contain information about using the rehype-react plugin or directly parsing HAST nodes as custom Preact components within Astro. The documentation covers how to use remark and rehype plugins in Astro for Markdown processing, and how to use Preact components in Astro projects, but it does not describe a workflow for mapping custom HTML elements in Markdown to Preact components via rehype-react or a similar approach.

Astro's documented approaches for custom Markdown rendering typically involve:

Using remark or rehype plugins to transform Markdown or HTML output (Markdown Plugins).
For MDX, mapping HTML elements to custom components via the components prop (Using Components in MDX).
For Markdoc, mapping tags or nodes to Astro components (Render components).

However, there is no explicit documentation for using rehype-react or a similar plugin to map custom HTML elements to Preact components in the standard Markdown pipeline in Astro.

If you are open to using MDX, you can map HTML elements to custom components as described in the MDX integration guide. Otherwise, for standard Markdown, the knowledge sources do not provide a solution for your use case.

#Parse HAST node as a custom preact component

If you are open to using MDX, you can map HTML elements to custom components as described in the MDX integration guide. Otherwise, for standard Markdown, the knowledge sources do not provide a solution for your use case.

Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: