unified

Project: syntax-tree/mdast-comment-marker

Package: mdast-comment-marker@2.1.0

  1. Dependents: 0
  2. mdast utility to parse a comment marker
  1. util 147
  2. utility 143
  3. unist 133
  4. mdast 88
  5. mdast-util 31
  6. marker 13
  7. comment 9

mdast-comment-marker

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mdast utility to parse comment markers.

Contents

What is this?

This package is a utility that tries to parse a structured marker from a comment.

When should I use this?

Comments are a hidden part of markdown, so they can be used as processing instructions. For example, this utility is used in remark-lint to control whether lint rules are turned on or ignored, and by mdast-zone to replace sections between two markers.

Install

This package is ESM only. In Node.js (version 12.20+, 14.14+, or 16.0+), install with npm:

npm install mdast-comment-marker

In Deno with esm.sh:

import {commentMarker} from 'https://esm.sh/mdast-comment-marker@2'

In browsers with esm.sh:

<script type="module">
  import {commentMarker} from 'https://esm.sh/mdast-comment-marker@2?bundle'
</script>

Use

import {commentMarker} from 'mdast-comment-marker'

console.log(commentMarker({type: 'html', value: '<!--foo-->'}));

console.log(commentMarker({
  type: 'html',
  value: '<!--foo bar baz=12.4 qux="test test" quux=\'false\'-->'
}));

console.log(commentMarker({type: 'html', value: '<!doctype html>'}));

// Also supports MDX expressions:
console.log(commentMarker({
  type: 'mdxFlowExpression',
  value: '/* lint disable heading-style */'
}));

Yields:

{
  name: 'foo',
  attributes: '',
  parameters: {},
  node: { type: 'html', value: '<!--foo-->' }
}
{
  name: 'foo',
  attributes: `bar baz=12.4 qux="test test" quux='false'`,
  parameters: { bar: true, baz: 12.4, qux: 'test test', quux: false },
  node: {
    type: 'html',
    value: `<!--foo bar baz=12.4 qux="test test" quux='false'-->`
  }
}
null
{
  name: 'lint',
  attributes: 'disable heading-style',
  parameters: { disable: true, 'heading-style': true },
  node: {
    type: 'mdxFlowExpression',
    value: '/* lint disable heading-style */'
  }
}

API

This package exports the identifier commentMarker. There is no default export.

commentMarker(node)

Parse a comment marker from node (Node).

Returns

Info, when applicable (Marker?).

Marker

Comment marker.

Properties

Types

This package is fully typed with TypeScript. This package exports the types Marker, MarkerParameterValue, and MarkerParameters.

Compatibility

Projects maintained by the unified collective are compatible with all maintained versions of Node.js. As of now, that is Node.js 12.20+, 14.14+, and 16.0+. Our projects sometimes work with older versions, but this is not guaranteed.

Security

Use of mdast-comment-marker does not involve hast, user content, or change the tree, so there are no openings for cross-site scripting (XSS) attacks.

Contribute

See contributing.md in syntax-tree/.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.

License

MIT © Titus Wormer