remark-lint-link-title-style

remark-lint rule to warn when link title markers violate a given style.

Contents

• What is this?
• When should I use this?
• Presets
• Install
• Use
• API
  • unified().use(remarkLintLinkTitleStyle[, options])
  • Options
  • Style
• Recommendation
• Fix
• Examples
• Compatibility
• Contribute
• License

What is this?

This package checks the style of link (and image and definition) title markers.

When should I use this?

You can use this package to check that the style of link title markers is consistent.

Presets

This plugin is included in the following presets:

Preset	Options
remark-preset-lint-consistent	'consistent'
remark-preset-lint-markdown-style-guide	'"'

Install

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

npm install remark-lint-link-title-style

In Deno with esm.sh:

import remarkLintLinkTitleStyle from 'https://esm.sh/remark-lint-link-title-style@4'

In browsers with esm.sh:

<script type="module">
  import remarkLintLinkTitleStyle from 'https://esm.sh/remark-lint-link-title-style@4?bundle'
</script>

Use

On the API:

import remarkLint from 'remark-lint'
import remarkLintLinkTitleStyle from 'remark-lint-link-title-style'
import remarkParse from 'remark-parse'
import remarkStringify from 'remark-stringify'
import {read} from 'to-vfile'
import {unified} from 'unified'
import {reporter} from 'vfile-reporter'

const file = await read('example.md')

await unified()
  .use(remarkParse)
  .use(remarkLint)
  .use(remarkLintLinkTitleStyle)
  .use(remarkStringify)
  .process(file)

console.error(reporter(file))

On the CLI:

remark --frail --use remark-lint --use remark-lint-link-title-style .

On the CLI in a config file (here a package.json):

 …
 "remarkConfig": {
   "plugins": [
     …
     "remark-lint",
+    "remark-lint-link-title-style",
     …
   ]
 }
 …

API

This package exports no identifiers. It exports the TypeScript types Options and Style. The default export is remarkLintLinkTitleStyle.

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

Warn when link title markers violate a given style.

Parameters

• options (Options, default: 'consistent') — preferred style or whether to detect the first style and warn for further differences

Returns

Transform (Transformer from unified).

Options

Configuration (TypeScript type).

Type

type Options = Style | 'consistent'

Style

Style (TypeScript type).

Type

type Style = '"' | '\'' | '()'

Recommendation

Before CommonMark, parens for titles were not supported in markdown. They should now work in most places. Parens do look a bit weird as they’re inside more parens: [text](url (title)).

In HTML, attributes are commonly written with double quotes. Due to this, titles are almost exclusively wrapped in double quotes in markdown, so it’s recommended to configure this rule with '"'.

Fix

remark-stringify formats titles with double quotes by default. Pass quote: "'" to use single quotes. There is no option to use parens.

Examples

ok-consistent.md

In

[Mercury](http://example.com/mercury/),
[Venus](http://example.com/venus/ "Go to Venus"), and
![Earth](http://example.com/earth/ "Go to Earth").

[Mars]: http://example.com/mars/ "Go to Mars"

Out

No messages.

not-ok-consistent.md

In

[Mercury](http://example.com/mercury/ "Go to Mercury") and
![Venus](http://example.com/venus/ 'Go to Venus').

[Earth]: http://example.com/earth/ (Go to Earth)

Out

2:1-2:50: Unexpected title markers `'`, expected `"`
4:1-4:49: Unexpected title markers `'('` and `')'`, expected `"`

ok-double.md

When configured with '"'.

In

[Mercury](http://example.com/mercury/ "Go to Mercury").

Out

No messages.

not-ok-double.md

When configured with '"'.

In

[Mercury](http://example.com/mercury/ 'Go to Mercury').

Out

1:1-1:55: Unexpected title markers `'`, expected `"`

ok-single.md

When configured with "'".

In

[Mercury](http://example.com/mercury/ 'Go to Mercury').

Out

No messages.

not-ok-single.md

When configured with "'".

In

[Mercury](http://example.com/mercury/ "Go to Mercury").

Out

1:1-1:55: Unexpected title markers `"`, expected `'`

ok-paren.md

When configured with '()'.

In

[Mercury](http://example.com/mercury/ (Go to Mercury)).

Out

No messages.

not-ok-paren.md

When configured with '()'.

In

[Mercury](http://example.com/mercury/ "Go to Mercury").

Out

1:1-1:55: Unexpected title markers `"`, expected `'('` and `')'`

not-ok.md

When configured with '🌍'.

Out

1:1: Unexpected value `🌍` for `options`, expected `'"'`, `"'"`, `'()'`, or `'consistent'`

ok-parens-in-url.md

When configured with '"'.

In

Parens in URLs work correctly:

[Mercury](http://example.com/(mercury) "Go to Mercury") and
[Venus](http://example.com/(venus)).

Out

No messages.

ok-whitespace.md

When configured with '"'.

In

Trailing whitespace works correctly:

[Mercury](http://example.com/mercury/␠"Go to Mercury"␠).

Out

No messages.

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-lint-link-title-style@4, compatible with Node.js 16.

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 © Titus Wormer