mdast-util-heading-style
mdast utility to get the style of a heading.
Contents
What is this?
This package is a tiny utility to figure out if a heading was written as ATX or
as setext.
## ATX uses hashes
Setext uses an underline
------------------------
When should I use this?
Probably not a lot!
It’s used in remark-lint
.
Install
This package is ESM only.
In Node.js (version 14.14+ and 16.0+), install with npm:
npm install mdast-util-heading-style
In Deno with esm.sh
:
import {headingStyle} from 'https://esm.sh/mdast-util-heading-style@2'
In browsers with esm.sh
:
<script type="module">
import {headingStyle} from 'https://esm.sh/mdast-util-heading-style@2?bundle'
</script>
Use
import {unified} from 'unified'
import {fromMarkdown} from 'mdast-util-from-markdown'
import {headingStyle} from 'mdast-util-heading-style'
headingStyle(fromMarkdown('# ATX').children[0])
headingStyle(fromMarkdown('# ATX #\n').children[0])
headingStyle(fromMarkdown('ATX\n===').children[0])
headingStyle(fromMarkdown('### ATX').children[0])
headingStyle(fromMarkdown('### ATX').children[0], 'setext')
API
This package exports the identifier headingStyle
.
There is no default export.
headingStyle(node[, relative])
Get the heading style of a heading, optionally relative
to a preferred
style.
This is because ATX headings with a depth of three or more could be
considered setext.
Parameters
node
(Heading
)
— heading node to checkstyle
(Style
, optional)
— relative style
Returns
Style (Style
) if it can be inferred, null
otherwise.
Style
Style of heading (TypeScript type).
Type
type Style = 'atx' | 'atx-closed' | 'setext'
Types
This package is fully typed with TypeScript.
It exports the additional type Style
.
Compatibility
Projects maintained by the unified collective are compatible with all maintained
versions of Node.js.
As of now, that is Node.js 14.14+ and 16.0+.
Our projects sometimes work with older versions, but this is not guaranteed.
Security
Use of mdast-util-heading-style
does not involve hast so there are
no openings for cross-site scripting (XSS) attacks.
Related
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