readme.md

remark-heading-gap

remark plugin to adjust the gap between headings in markdown.

Contents

• What is this?
• When should I use this?
• Install
• Use
• API
  • unified().use(remarkHeadingGap[, options])
  • Gap
  • Options
• Examples
  • Example: blank lines around first/last headings
• Types
• Compatibility
• Security
• Related
• Contribute
• License

What is this?

This package is a unified (remark) plugin that lets you change the gap (number of blank lines) between headings and surrounding text when formatting markdown.

When should I use this?

This project is useful when you want to adjust the gap around headings when formatting markdown. For example, when you want two blank lines before headings with a rank of 2 (## Like so). From personal experience, adding extra blank lines helps visualize breaks in sections, especially when quickly scanning documentation. The default when serializing markdown with remark-stringify is to always but a single blank line between blocks (headings, paragraphs, lists, code, etc).

Install

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

npm install remark-heading-gap

In Deno with esm.sh:

import remarkHeadingGap from 'https://esm.sh/remark-heading-gap@6'

In browsers with esm.sh:

<script type="module">
  import remarkHeadingGap from 'https://esm.sh/remark-heading-gap@6?bundle'
</script>

Use

Say we have the following file example.md:

# Pluto

## Contents

## History

### Discovery

### Name and symbol

### Planet X disproved

## Orbit

…and a module example.js:

import {remark} from 'remark'
import remarkHeadingGap from 'remark-heading-gap'
import {read} from 'to-vfile'

const file = await remark()
  .use(remarkHeadingGap)
  .process(await read('example.md'))

console.log(String(file))

…then running node example.js yields:

# Pluto


## Contents


## History

### Discovery

### Name and symbol

### Planet X disproved


## Orbit

API

This package exports no identifiers. The default export is remarkHeadingGap.

unified().use(remarkHeadingGap[, options])

Adjust the gap between headings.

There are no blank lines added if a heading is the first or last child of the document, list item, or block quote. For example, pass {1: {before: 2, after: 2}} to add two blank lines before and after the main heading. You can also set values to 0 to not add blank lines.

Parameters

• options (Options, default: {2: {before: 2}}) — configuration

Returns

Nothing (undefined).

Gap

Gap between a heading (TypeScript type).

Fields

• after (number, default: 1) — blank lines after heading
• before (number, default: 1) — blank lines before heading

Options

Configuration (TypeScript type).

Type

type Options = Partial<Record<1 | 2 | 3 | 4 | 5 | 6, Gap | null | undefined>>

Examples

Example: blank lines around first/last headings

This example shows that there are no blank lines added before the first and after the last heading in a container. Assuming we had example.md from before and changed it to contain this:

# Alpha

Bravo charlie.

> ## Delta
>
> Echo foxtrott.
>
> ## Golf

Then configuring this plugin in example.js like so:

@@ -3,7 +3,10 @@ import remarkHeadingGap from 'remark-heading-gap'
 import {read} from 'to-vfile'

 const file = await remark()
-  .use(remarkHeadingGap)
+  .use(remarkHeadingGap, {
+    1: {after: 3, before: 3},
+    2: {after: 2, before: 2}
+  })
   .process(await read('example.md'))

 console.log(String(file))

Then when running node example.js we’d get:

# Alpha



Bravo charlie.

> ## Delta
>
>
> Echo foxtrott.
>
>
> ## Golf

Types

This package is fully typed with TypeScript. It exports the additional types Gap and Options.

Compatibility

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, remark-heading-gap@^6, compatible with Node.js 16.

This plugin works with remark-stringify version 9+ (remark version 13+). Version 3 of this plugin worked with remark-stringify version 8- (remark version 12-).

Security

Use of remark-heading-gap does not involve rehype (hast) or user content so there are no openings for cross-site scripting (XSS) attacks.

Related

• remarkjs/remark-normalize-headings — make sure there is a single top level heading in a document by adjusting heading ranks accordingly

Contribute

See contributing.md in remarkjs/.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 © Ben Briggs