hast-util-heading-rank

hast utility to get the rank (also known as depth or level) of headings.

Contents

• What is this?
• When should I use this?
• Install
• Use
• API
  • headingRank(node)
• Types
• Compatibility
• Security
• Related
• Contribute
• License

What is this?

This package is a utility that lets you get the rank (1, 6) of heading elements (h1, h6).

When should I use this?

This utility is pretty niche, if you’re here you probably know what you’re looking for!

To change heading ranks, use hast-util-shift-heading.

Install

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

npm install hast-util-heading-rank

In Deno with esm.sh:

import {headingRank} from 'https://esm.sh/hast-util-heading-rank@2'

In browsers with esm.sh:

<script type="module">
  import {headingRank} from 'https://esm.sh/hast-util-heading-rank@2?bundle'
</script>

Use

import {h} from 'hastscript'
import {headingRank} from 'hast-util-heading-rank'

headingRank(h('p', 'Alpha')) //=> null
headingRank(h('h5', 'Alpha')) //=> 5

API

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

headingRank(node)

Get the rank (1 to 6) of headings (h1 to h6).

Parameters

• node (Node) — node to check

Returns

Rank of the heading or null if not a heading (number?).

Types

This package is fully typed with TypeScript. It exports no additional types.

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

hast-util-heading-rank does not mutate. There are no openings for cross-site scripting (XSS) attacks.

Related

• hast-util-heading — check if a node is heading content
• hast-util-shift-heading — change heading rank

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