312 lines
8.5 KiB
Markdown
312 lines
8.5 KiB
Markdown
# remark-stringify [![Travis][build-badge]][build-status] [![Coverage][coverage-badge]][coverage-status] [![Downloads][dl-badge]][dl] [![Size][size-badge]][size] [![Chat][chat-badge]][chat]
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[Compiler][] for [**unified**][unified].
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Stringifies [**mdast**][mdast] syntax trees to markdown.
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Used in the [**remark** processor][processor] but can be used on its own as
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well.
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Can be [extended][extend] to change how markdown is parsed.
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* * *
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**Announcing the unified collective! 🎉
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[Read more about it on Medium »][announcement]**
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## Sponsors
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<!--lint ignore no-html maximum-line-length-->
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<table>
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<tr valign="top">
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<td width="20%" align="center">
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<a href="https://zeit.co"><img src="https://avatars1.githubusercontent.com/u/14985020?s=400&v=4"></a>
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<br><br>🥇
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<a href="https://zeit.co">ZEIT</a>
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</td>
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<td width="20%" align="center">
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<a href="https://www.gatsbyjs.org"><img src="https://avatars1.githubusercontent.com/u/12551863?s=400&v=4"></a>
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<br><br>🥇
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<a href="https://www.gatsbyjs.org">Gatsby</a></td>
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<td width="20%" align="center">
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<a href="https://compositor.io"><img src="https://avatars1.githubusercontent.com/u/19245838?s=400&v=4"></a>
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<br><br>🥉
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<a href="https://compositor.io">Compositor</a>
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</td>
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<td width="20%" align="center">
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<a href="https://www.holloway.com"><img src="https://avatars1.githubusercontent.com/u/35904294?s=400&v=4"></a>
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<br><br>
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<a href="https://www.holloway.com">Holloway</a>
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</td>
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<td width="20%" align="center">
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<br><br><br><br>
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<a href="https://opencollective.com/unified"><strong>You?</strong>
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</td>
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</tr>
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</table>
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## Installation
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[npm][]:
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```sh
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npm install remark-stringify
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```
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## Usage
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```js
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var unified = require('unified')
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var createStream = require('unified-stream')
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var parse = require('remark-parse')
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var toc = require('remark-toc')
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var stringify = require('remark-stringify')
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var processor = unified()
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.use(parse)
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.use(toc)
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.use(stringify, {
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bullet: '*',
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fence: '~',
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fences: true,
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incrementListMarker: false
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})
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process.stdin.pipe(createStream(processor)).pipe(process.stdout)
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```
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## Table of Contents
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* [API](#api)
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* [processor.use(stringify\[, options\])](#processorusestringify-options)
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* [stringify.Compiler](#stringifycompiler)
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* [Extending the Compiler](#extending-the-compiler)
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* [Compiler#visitors](#compilervisitors)
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* [function visitor(node\[, parent\])](#function-visitornode-parent)
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* [License](#license)
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## API
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### `processor.use(stringify[, options])`
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Configure the `processor` to stringify [**mdast**][mdast] syntax trees
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to markdown.
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##### `options`
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Options are passed directly, or passed later through [`processor.data()`][data].
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###### `options.gfm`
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Stringify with the required escapes for GFM compatible markdown (`boolean`,
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default: `true`).
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* Escape pipes (`|`, for tables)
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* Escape colons (`:`, for literal URLs)
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* Escape tildes (`~`, for strike-through)
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###### `options.commonmark`
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Stringify for CommonMark compatible markdown (`boolean`, default: `false`).
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* Compile adjacent blockquotes separately
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* Escape more characters using slashes, instead of as entities
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###### `options.pedantic`
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Stringify for pedantic compatible markdown (`boolean`, default: `false`).
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* Escape underscores in words
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###### `options.entities`
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How to stringify entities (`string` or `boolean`, default: `false`):
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* `true` — Entities are generated for special HTML characters
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(`&` > `&`) and non-ASCII characters (`©` > `©`).
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If named entities are not (widely) supported, numbered character
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references are used (`’` > `’`)
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* `'numbers'` — Numbered entities are generated (`&` > `&`)
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for special HTML characters and non-ASCII characters
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* `'escape'` — Special HTML characters are encoded (`&` >
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`&`, `’` > `’`), non-ASCII characters not (ö persists)
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###### `options.setext`
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Compile headings, when possible, in Setext-style (`boolean`, default: `false`).
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Uses `=` for level one headings and `-` for level two headings. Other heading
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levels are compiled as ATX (respecting `closeAtx`).
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###### `options.closeAtx`
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Compile ATX headings with the same amount of closing hashes as opening hashes
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(`boolean`, default: `false`).
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###### `options.looseTable`
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Create tables without fences: initial and final pipes (`boolean`, default:
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`false`).
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###### `options.spacedTable`
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Create tables without spacing between pipes and content (`boolean`, default:
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`true`).
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###### `options.paddedTable`
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Create tables with padding in each cell so that they are the same size
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(`boolean`, default: `true`).
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###### `options.stringLength`
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Function passed to [`markdown-table`][markdown-table] to detect the length of a
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table cell (`Function`, default: [`s => s.length`][string-length]).
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###### `options.fence`
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Fence marker to use for code blocks (`'~'` or ``'`'``, default: ``'`'``).
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###### `options.fences`
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Stringify code blocks without language with fences (`boolean`, default:
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`false`).
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###### `options.bullet`
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Bullet marker to use for unordered list items (`'-'`, `'*'`, or `'+'`,
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default: `'-'`).
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###### `options.listItemIndent`
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How to indent the content from list items (`'tab'`, `'mixed'` or `'1'`,
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default: `'tab'`).
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* `'tab'`: use tab stops (4 spaces)
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* `'1'`: use one space
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* `'mixed'`: use `1` for tight and `tab` for loose list items
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###### `options.incrementListMarker`
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Whether to increment ordered list item bullets (`boolean`, default: `true`).
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###### `options.rule`
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Marker to use for thematic breaks / horizontal rules (`'-'`, `'*'`, or `'_'`,
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default: `'*'`).
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###### `options.ruleRepetition`
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Number of markers to use for thematic breaks / horizontal rules (`number`,
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default: `3`). Should be `3` or more.
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###### `options.ruleSpaces`
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Whether to pad thematic break (horizontal rule) markers with spaces (`boolean`,
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default `true`).
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###### `options.strong`
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Marker to use for importance (`'_'` or `'*'`, default `'*'`).
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###### `options.emphasis`
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Marker to use for emphasis (`'_'` or `'*'`, default `'_'`).
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### `stringify.Compiler`
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Access to the raw [compiler][], if you need it.
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## Extending the Compiler
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If this plugin is used, it adds a [`Compiler`][compiler] constructor
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to the `processor`. Other plugins can change and add visitors on
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the compiler’s prototype to change how markdown is stringified.
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The below plugin modifies a [visitor][] to add an extra blank line
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before level two headings.
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```js
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module.exports = gap
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function gap() {
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var Compiler = this.Compiler
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var visitors = Compiler.prototype.visitors
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var original = visitors.heading
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visitors.heading = heading
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function heading(node) {
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return (node.depth === 2 ? '\n' : '') + original.apply(this, arguments)
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}
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}
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```
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### `Compiler#visitors`
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An object mapping [node][] types to [`visitor`][visitor]s.
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### `function visitor(node[, parent])`
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Stringify `node`.
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###### Parameters
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* `node` ([`Node`][node]) — Node to compile
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* `parent` ([`Node`][node], optional) — Parent of `node`
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###### Returns
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`string`, the compiled given `node`.
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## License
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[MIT][license] © [Titus Wormer][author]
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<!-- Definitions -->
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[build-badge]: https://img.shields.io/travis/remarkjs/remark/master.svg
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[build-status]: https://travis-ci.org/remarkjs/remark
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[coverage-badge]: https://img.shields.io/codecov/c/github/remarkjs/remark.svg
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[coverage-status]: https://codecov.io/github/remarkjs/remark
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[dl-badge]: https://img.shields.io/npm/dm/remark-stringify.svg
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[dl]: https://www.npmjs.com/package/remark-stringify
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[size-badge]: https://img.shields.io/bundlephobia/minzip/remark-stringify.svg
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[size]: https://bundlephobia.com/result?p=remark-stringify
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[chat-badge]: https://img.shields.io/badge/join%20the%20community-on%20spectrum-7b16ff.svg
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[chat]: https://spectrum.chat/unified/remark
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[license]: https://github.com/remarkjs/remark/blob/master/license
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[author]: https://wooorm.com
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[npm]: https://docs.npmjs.com/cli/install
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[unified]: https://github.com/unifiedjs/unified
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[processor]: https://github.com/remarkjs/remark
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[data]: https://github.com/unifiedjs/unified#processordatakey-value
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[compiler]: https://github.com/unifiedjs/unified#processorcompiler
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[mdast]: https://github.com/syntax-tree/mdast
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[node]: https://github.com/syntax-tree/unist#node
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[extend]: #extending-the-compiler
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[visitor]: #function-visitornode-parent
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[markdown-table]: https://github.com/wooorm/markdown-table
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[string-length]: https://github.com/wooorm/markdown-table#stringlengthcell
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[announcement]: https://medium.com/unifiedjs/collectively-evolving-through-crowdsourcing-22c359ea95cc
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