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rehypejs/rehype-document: plugin to wrap a fragment in a document

rehype plugin to wrap a fragment in a document.

This package is a unified (rehype) plugin to wrap a fragment in a document. It’s especially useful when going from a markdown file that represents an article and turning it into a complete HTML document.

unified is a project that transforms content with abstract syntax trees (ASTs). rehype adds support for HTML to unified. hast is the HTML AST that rehype uses. This is a rehype plugin that wraps a fragment in a document.

This project is useful when you want to turn a fragment (specifically, some nodes that can exist in a <body> element) into a whole document (a <html>, <head>, and <body>, where the latter will contain the fragment).

This plugin can make fragments valid whole documents. It’s not a (social) metadata manager. That’s done by rehype-meta. You can use both together.

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

npm install rehype-document

In Deno with esm.sh:

import rehypeDocument from 'https://esm.sh/rehype-document@7'

In browsers with esm.sh:

<script type="module">
  import rehypeDocument from 'https://esm.sh/rehype-document@7?bundle'
</script>

Say we have the following file example.md:

# Pluto

Pluto is a dwarf planet in the Kuiper belt.

…and a module example.js :

import rehypeDocument from 'rehype-document'
import rehypeStringify from 'rehype-stringify'
import remarkParse from 'remark-parse'
import remarkRehype from 'remark-rehype'
import {read} from 'to-vfile'
import {unified} from 'unified'

const file = await unified()
  .use(remarkParse)
  .use(remarkRehype)
  .use(rehypeDocument, {title: 'Pluto'})
  .use(rehypeStringify)
  .process(await read('example.md'))

console.log(String(file))

…then running node example.js yields:

<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Pluto</title>
<meta content="width=device-width, initial-scale=1" name="viewport">
</head>
<body>
<h1>Pluto</h1>
<p>Pluto is a dwarf planet in the Kuiper belt.</p>
</body>
</html>

This package exports no identifiers. It exports the TypeScript type Options. The default export is rehypeDocument.

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

Wrap a fragment in a document.

options (Options, optional) — configuration

Transform (Transformer).

Configuration (TypeScript type).

css (Array<string> or string, optional) — URLs to stylesheets to use in <link>s
dir ('auto', 'ltr', or 'rtl', optional) — direction of the document
js (Array<string> or string, optional) — URLs to scripts to use as src on <script>s
language (string, default: 'en') — language of document; should be a BCP 47 language tag
link (Array<Properties> or Properties, optional) — generate extra <link>s with these properties; passed as properties to hastscript with 'link'
meta (Array<Properties> or Properties, optional) — generate extra <meta>s with these properties; passed as properties to hastscript with 'meta'
responsive (boolean, default: true) — generate a meta[viewport]
script (Array<string> or string, optional) — JavaScript source code of <script>s to add at end of body
style (Array<string> or string, optional) — CSS source code of <style>s to add
title (string, optional) — text to use as title; defaults to the file name (if any); can bet set with file.data.matter.title (vfile-matter) and file.data.meta.title (rehype-infer-title-meta), which are preferred

Example: language and direction

This example shows how to set a language:

import rehypeDocument from 'rehype-document'
import rehypeParse from 'rehype-parse'
import rehypeStringify from 'rehype-stringify'
import {unified} from 'unified'

const file = await unified()
  .use(rehypeParse, {fragment: true})
  .use(rehypeDocument, {title: 'פּלוטאָ', language: 'yi', dir: 'rtl'})
  .use(rehypeStringify)
  .process('<h1>העלא, פּלוטאָ!</h1>')

console.log(String(file))

Yields:

<!doctype html>
<html dir="rtl" lang="yi">
<head>
<meta charset="utf-8">
<title>פּלוטאָ</title>
<meta content="width=device-width, initial-scale=1" name="viewport">
</head>
<body>
<h1>העלא, פּלוטאָ!</h1>
</body>
</html>

This example shows how to reference CSS files and include stylesheets:

import rehypeDocument from 'rehype-document'
import rehypeParse from 'rehype-parse'
import rehypeStringify from 'rehype-stringify'
import {unified} from 'unified'

const file = await unified()
  .use(rehypeParse, {fragment: true})
  .use(rehypeDocument, {
    css: 'https://example.com/index.css',
    style: 'body { color: red }'
  })
  .use(rehypeStringify)
  .process('')

console.log(String(file))

Yields:

<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta content="width=device-width, initial-scale=1" name="viewport">
<style>body { color: red }</style>
<link href="https://example.com/index.css" rel="stylesheet">
</head>
<body>
</body>
</html>

This example shows how to reference JS files and include scripts:

import rehypeDocument from 'rehype-document'
import rehypeParse from 'rehype-parse'
import rehypeStringify from 'rehype-stringify'
import {unified} from 'unified'

const file = await unified()
  .use(rehypeParse, {fragment: true})
  .use(rehypeDocument, {
    js: 'https://example.com/index.js',
    script: 'console.log(1)'
  })
  .use(rehypeStringify)
  .process('')

console.log(String(file))

Yields:

<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta content="width=device-width, initial-scale=1" name="viewport">
</head>
<body>
<script>console.log(1)</script>
<script src="https://example.com/index.js"></script>
</body>
</html>

Example: metadata and links

This example shows how to define metadata and include links (other than styles):

import rehypeDocument from 'rehype-document'
import rehypeParse from 'rehype-parse'
import rehypeStringify from 'rehype-stringify'
import {unified} from 'unified'

const file = await unified()
  .use(rehypeParse, {fragment: true})
  .use(rehypeDocument, {
    link: [
      {href: '/favicon.ico', rel: 'icon', sizes: 'any'},
      {href: '/icon.svg', rel: 'icon', type: 'image/svg+xml'}
    ],
    meta: [{content: 'rehype-document', name: 'generator'}]
  })
  .use(rehypeStringify)
  .process('')

console.log(String(file))

Yields:

<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta content="width=device-width, initial-scale=1" name="viewport">
<meta content="rehype-document" name="generator">
<link href="/favicon.ico" rel="icon" sizes="any">
<link href="/icon.svg" rel="icon" type="image/svg+xml">
</head>
<body>
</body>
</html>

💡 Tip: rehype-meta is a (social) metadata manager.

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, rehype-document@7, compatible with Node.js 16.

This plugin works with rehype-parse version 3+, rehype-stringify version 3+, rehype version 5+, and unified version 6+.

Use of rehype-document can open you up to a cross-site scripting (XSS) attack if you pass user provided content in options. Always be wary of user input and use rehype-sanitize.

rehype-meta — add metadata to the head of a document
rehype-format — format HTML
rehype-minify — minify HTML

See contributing.md in rehypejs/.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.

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