Project: unifiedjs/unified-message-control

Package: unified-message-control@4.0.0

  1. Dependents: 0
  2. Enable, disable, and ignore messages from unified processors
  1. unified 181
  2. marker 13
  3. comment 9
  4. message 8
  5. unified-plugin 6
  6. control 3


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unified utility to enable, disable, and ignore messages.


What is this?

This is a lego block that is meant to be extended, such as is done by remark-message-control, so that lint messages can be controlled from content.

When should I use this?

You can use this if you’re building an ecosystem like remark for some different content type, and want to let authors control messages from that content.


This package is ESM only. In Node.js (version 16+), install with npm:

npm install unified-message-control

In Deno with esm.sh:

import {messageControl} from 'https://esm.sh/unified-message-control@5'

In browsers with esm.sh:

<script type="module">
  import {messageControl} from 'https://esm.sh/unified-message-control@5?bundle'


Say our document example.md contains:

<!--foo ignore-->

## Heading

…and our module example.js looks as follows:

import {commentMarker} from 'mdast-comment-marker'
import remarkParse from 'remark-parse'
import remarkStringify from 'remark-stringify'
import {read} from 'to-vfile'
import {unified} from 'unified'
import {messageControl} from 'unified-message-control'
import {reporter} from 'vfile-reporter'

const file = await read('example.md')

await unified()
  .use(function () {
    return function (tree, file) {
      file.message('Whoops!', tree.children[1], 'foo:thing')
  .use(messageControl, {
    marker: commentMarker,
    name: 'foo',
    test: 'html'


…now running node example.js yields:

example.md: no issues found


This package exports no identifiers. It exports the identifier messageControl.

messageControl(tree, options)

Let comment markers control messages.


Nothing (undefined).


Comment marker (TypeScript type).


The disable keyword turns off messages. For example:

<!--lint disable list-item-bullet-indent strong-marker-->

*   **foo**

A paragraph, and now another list.

  * __bar__

The enable keyword turns on messages. For example:

<!--lint enable strong-marker-->

**foo** and __bar__.

The ignore keyword turns off messages in the following node. After the end of the following node, messages are turned on again. For example:

<!--lint ignore list-item-bullet-indent strong-marker-->

*   **foo**
    * __bar__


Parse a possible comment marker (TypeScript type).


Marker (Marker, optional).


Configuration (TypeScript type).


The given name defines which comments work. Assuming there’s a marker configured that parses HTML comments such as <!--x y z--> to a mark with name: 'x', then giving name: 'x' will use comments such as:

<!--alpha ignore-->

When known is given, a warning is shown when unknown rules are controlled. For example, {name: 'alpha', known: ['bravo']} results in a warning (for charlie):

<!--alpha ignore charlie-->


This package is fully typed with TypeScript. It exports the additional types Marker, MarkerParser, and Options.


Projects maintained by the unified collective are compatible with maintained versions of Node.js.

When we cut a new major release, we drop support for unmaintained versions of Node. This means we try to keep the current release line, unified-message-control@^5, compatible with Node.js 16.


See contributing.md in unifiedjs/.github for ways to get started. See support.md for ways to get help.

This project has a code of conduct. By interacting with this repository, organization, or community you agree to abide by its terms.


MIT © Titus Wormer