Inline HTML comments are output as visible text #466

Environment

• Operating System: macOS (Darwin)
• Node Version: v24.6.0
• Package Manager: pnpm@10.8.0
• Comark Version: 0.7.0
• Framework: None (also reproduced with Vue / Nuxt 4.5.2 via @comark/nuxt 0.7.0, client render and SSR)

Comark Version

0.7.0

Reproduction

npm i comark@0.7.0

// repro.mjs
import { parseMarkdown } from 'comark'

const doc = await parseMarkdown('Hello <!-- note --> world')
console.log(JSON.stringify(doc.nodes))
// [["p",{},"Hello <!-- note --> world"]]

Description

An HTML comment on its own line becomes a comment node, which is correct (see SPEC/COMARK/comment.md). An HTML comment inside a line of text becomes part of the text, so renderers show <!-- note --> to the reader.

Input

Hello <!-- note --> world

Actual output

<p>Hello &lt;!-- note --&gt; world</p>

The reader sees: Hello <!-- note --> world.

Expected output

<p>Hello <!-- note --> world</p>

The reader sees: Hello world. This matches GitHub and @nuxtjs/mdc.

Additional context

• This is a regression from @nuxtjs/mdc, which parses the inline comment as a comment node, so migrated documents keep the comment invisible.
• The same behavior was verified in a Nuxt 4.5.2 app using @comark/nuxt 0.7.0, both client-side and in SSR output.

Logs

Not applicable; the reproduction above shows the full output.