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https://github.com/remarkjs/remark-html

plugin to add support for serializing HTML
https://github.com/remarkjs/remark-html

html markdown remark remark-plugin

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plugin to add support for serializing HTML

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README 

        
# remark-html



[![Build][build-badge]][build]

[![Coverage][coverage-badge]][coverage]

[![Downloads][downloads-badge]][downloads]

[![Size][size-badge]][size]

[![Sponsors][sponsors-badge]][collective]

[![Backers][backers-badge]][collective]

[![Chat][chat-badge]][chat]



**[remark][]** plugin to add support for serializing HTML.



## Contents



*   [What is this?](#what-is-this)

*   [When should I use this?](#when-should-i-use-this)

*   [Install](#install)

*   [Use](#use)

*   [API](#api)

    *   [`unified().use(remarkHtml[, options])`](#unifieduseremarkhtml-options)

    *   [`Options`](#options)

*   [Types](#types)

*   [Compatibility](#compatibility)

*   [Security](#security)

*   [Related](#related)

*   [Contribute](#contribute)

*   [License](#license)



## What is this?



This package is a [unified][] ([remark][]) plugin that compiles markdown to

HTML.



## When should I use this?



This plugin is useful when you want to turn markdown into HTML.

It’s a shortcut for

`.use(remarkRehype).use(rehypeSanitize).use(rehypeStringify)`.



The reason that there are different ecosystems for markdown and HTML is that

turning markdown into HTML is, while frequently needed, not the only purpose of

markdown.

Checking (linting) and formatting markdown are also common use cases for

remark and markdown.

There are several aspects of markdown that do not translate 1-to-1 to HTML.

In some cases markdown contains more information than HTML: for example, there

are several ways to add a link in markdown (as in, autolinks: ``,

resource links: `[label](url)`, and reference links with definitions:

`[label][id]` and `[id]: url`).

In other cases HTML contains more information than markdown: there are many

tags, which add new meaning (semantics), available in HTML that aren’t available

in markdown.

If there was just one AST, it would be quite hard to perform the tasks that

several remark and rehype plugins currently do.



This plugin is useful when you want to quickly turn markdown into HTML.

In most cases though, it’s recommended to use [`remark-rehype`][remark-rehype]

instead and finally use [`rehype-stringify`][rehype-stringify] to serialize

HTML.

The reason using both ecosystems instead of this plugin is recommended, is that

there are many useful rehype plugins that you can then use.

For example, you can [minify HTML][rehype-minify], [format HTML][rehype-format],

[highlight code][rehype-highlight], [add metadata][rehype-meta], and a lot more.



## Install



This package is [ESM only][esm].

In Node.js (version 16+), install with [npm][]:



```sh

npm install remark-html

```



In Deno with [`esm.sh`][esmsh]:



```js

import remarkHtml from 'https://esm.sh/remark-html@16'

```



In browsers with [`esm.sh`][esmsh]:



```html



  import remarkHtml from 'https://esm.sh/remark-html@16?bundle'



```



## Use



Say we have the following file `example.md`:



```markdown

# Pluto



**Pluto** (minor-planet designation: **134340 Pluto**) is a

[dwarf planet](https://en.wikipedia.org/wiki/Dwarf_planet) in the

[Kuiper belt](https://en.wikipedia.org/wiki/Kuiper_belt).

```



…and a module `example.js`:



```js

import remarkHtml from 'remark-html'

import remarkParse from 'remark-parse'

import {read} from 'to-vfile'

import {unified} from 'unified'



const file = await unified()

  .use(remarkParse)

  .use(remarkHtml)

  .process(await read('example.md'))



console.log(String(file))

```



…then running `node example.js` yields:



```html

Pluto


Pluto (minor-planet designation: 134340 Pluto) is a

dwarf planet in the

Kuiper belt.


```



## API



This package exports no identifiers.

The default export is [`remarkHtml`][api-remark-html].



### `unified().use(remarkHtml[, options])`



Serialize markdown as HTML.



###### Parameters



*   `options` ([`Options`][api-options], optional)

    — configuration



###### Returns



Transform ([`Transformer`][unified-transformer]).



###### Notes



Passing `sanitize: false` is dangerous.

It allows arbitrary HTML and does not sanitize elements.



### `Options`



Configuration (TypeScript type).



###### Fields



*   `handlers` ([`Handlers` from

    `mdast-util-to-hast`][mdast-util-to-hast-handlers], optional)

    — how to turn mdast nodes into hast nodes

*   `sanitize` ([`Schema` from

    `hast-util-sanitize`][hast-util-sanitize-schema] or `boolean`, default:

    `true`)

    — sanitize the output, and how

*   `...toHtmlOptions` ([`Options` from

    `hast-util-to-html`][hast-util-to-html-options], optional)

    — other options are passed to `hast-util-to-html`



## Types



This package is fully typed with [TypeScript][].

It exports the additional type [`Options`][api-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-html@^16`,

compatible with Node.js 16.



This plugin works with `unified` version 6+ and `remark` version 15+.



## Security



Use of `remark-html` is safe by default.

Passing `sanitize: false` is unsafe and opens you up to

[cross-site scripting (XSS)][wiki-xss] attacks.

A safe schema is used by default, but passing an unsafe schema is unsafe.



## Related



*   [`remark-rehype`](https://github.com/remarkjs/remark-rehype)

    — turn markdown into HTML to support rehype

*   [`rehype-sanitize`](https://github.com/rehypejs/rehype-sanitize)

    — sanitize HTML



## Contribute



See [`contributing.md`][contributing] in [`remarkjs/.github`][health] for ways

to get started.

See [`support.md`][support] for ways to get help.



This project has a [code of conduct][coc].

By interacting with this repository, organization, or community you agree to

abide by its terms.



## License



[MIT][license] © [Titus Wormer][author]



[build-badge]: https://github.com/remarkjs/remark-html/workflows/main/badge.svg



[build]: https://github.com/remarkjs/remark-html/actions



[coverage-badge]: https://img.shields.io/codecov/c/github/remarkjs/remark-html.svg



[coverage]: https://codecov.io/github/remarkjs/remark-html



[downloads-badge]: https://img.shields.io/npm/dm/remark-html.svg



[downloads]: https://www.npmjs.com/package/remark-html



[size-badge]: https://img.shields.io/bundlejs/size/remark-html



[size]: https://bundlejs.com/?q=remark-html



[sponsors-badge]: https://opencollective.com/unified/sponsors/badge.svg



[backers-badge]: https://opencollective.com/unified/backers/badge.svg



[collective]: https://opencollective.com/unified



[chat-badge]: https://img.shields.io/badge/chat-discussions-success.svg



[chat]: https://github.com/remarkjs/remark/discussions



[npm]: https://docs.npmjs.com/cli/install



[esm]: https://gist.github.com/sindresorhus/a39789f98801d908bbc7ff3ecc99d99c



[esmsh]: https://esm.sh



[health]: https://github.com/remarkjs/.github



[contributing]: https://github.com/remarkjs/.github/blob/main/contributing.md



[support]: https://github.com/remarkjs/.github/blob/main/support.md



[coc]: https://github.com/remarkjs/.github/blob/main/code-of-conduct.md



[license]: license



[author]: https://wooorm.com



[hast-util-sanitize-schema]: https://github.com/syntax-tree/hast-util-sanitize#schema



[hast-util-to-html-options]: https://github.com/syntax-tree/hast-util-to-html#options



[mdast-util-to-hast-handlers]: https://github.com/syntax-tree/mdast-util-to-hast#handlers



[rehype-format]: https://github.com/rehypejs/rehype-format



[rehype-highlight]: https://github.com/rehypejs/rehype-highlight



[rehype-meta]: https://github.com/rehypejs/rehype-meta



[rehype-minify]: https://github.com/rehypejs/rehype-minify



[rehype-stringify]: https://github.com/rehypejs/rehype/tree/main/packages/rehype-stringify



[remark]: https://github.com/remarkjs/remark



[remark-rehype]: https://github.com/remarkjs/remark-rehype



[typescript]: https://www.typescriptlang.org



[unified]: https://github.com/unifiedjs/unified



[unified-transformer]: https://github.com/unifiedjs/unified#transformer



[wiki-xss]: https://en.wikipedia.org/wiki/Cross-site_scripting



[api-options]: #options



[api-remark-html]: #unifieduseremarkhtml-options