mdast-comment-marker
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
name(string) — name of markerattributes(string) — value after nameparameters(Object) — parsed attributes, with decimal numbers,true, andfalseare casted to numbers and booleansnode(Node) — reference to given node
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.
Related
mdast-zone— change or replace a section marked by comments
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.