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211 lines
5.8 KiB
Text
211 lines
5.8 KiB
Text
# remark-footnotes
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[![Build][build-badge]][build]
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[![Coverage][coverage-badge]][coverage]
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[![Downloads][downloads-badge]][downloads]
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[![Size][size-badge]][size]
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[![Sponsors][sponsors-badge]][collective]
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[![Backers][backers-badge]][collective]
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[![Chat][chat-badge]][chat]
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[**remark**][remark] plugin to add support for footnotes.
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## Install
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[npm][]:
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```sh
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npm install remark-footnotes
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```
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## Use
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Say we have the following file, `example.md`:
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```markdown
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Here is a footnote reference,[^1]
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another,[^longnote],
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and optionally there are inline
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notes.^[you can type them inline, which may be easier, since you don’t
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have to pick an identifier and move down to type the note.]
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[^1]: Here is the footnote.
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[^longnote]: Here’s one with multiple blocks.
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Subsequent paragraphs are indented to show that they
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belong to the previous footnote.
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{ some.code }
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The whole paragraph can be indented, or just the first
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line. In this way, multi-paragraph footnotes work like
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multi-paragraph list items.
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This paragraph won’t be part of the note, because it
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isn’t indented.
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```
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And our script, `example.js`, looks as follows:
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```js
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var vfile = require('to-vfile')
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var unified = require('unified')
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var markdown = require('remark-parse')
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var remark2rehype = require('remark-rehype')
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var format = require('rehype-format')
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var html = require('rehype-stringify')
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var footnotes = require('remark-footnotes')
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unified()
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.use(markdown)
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.use(footnotes, {inlineNotes: true})
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.use(remark2rehype)
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.use(format)
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.use(html)
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.process(vfile.readSync('example.md'), function (err, file) {
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if (err) throw err
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console.log(String(file))
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})
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```
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Now, running `node example` yields:
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```html
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<p>
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Here is a footnote reference,<sup id="fnref-1"><a href="#fn-1" class="footnote-ref">1</a></sup>
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another,<sup id="fnref-longnote"><a href="#fn-longnote" class="footnote-ref">longnote</a></sup>,
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and optionally there are inline
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notes.<sup id="fnref-2"><a href="#fn-2" class="footnote-ref">2</a></sup>
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</p>
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<p>
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This paragraph won’t be part of the note, because it
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isn’t indented.
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</p>
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<div class="footnotes">
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<hr>
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<ol>
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<li id="fn-1">
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<p>Here is the footnote.<a href="#fnref-1" class="footnote-backref">↩</a></p>
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</li>
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<li id="fn-longnote">
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<p>Here’s one with multiple blocks.</p>
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<p>
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Subsequent paragraphs are indented to show that they
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belong to the previous footnote.
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</p>
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<pre><code>{ some.code }
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</code></pre>
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<p>
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The whole paragraph can be indented, or just the first
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line. In this way, multi-paragraph footnotes work like
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multi-paragraph list items.<a href="#fnref-longnote" class="footnote-backref">↩</a>
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</p>
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</li>
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<li id="fn-2">
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<p>
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you can type them inline, which may be easier, since you don’t
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have to pick an identifier and move down to type the note.<a href="#fnref-2" class="footnote-backref">↩</a>
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</p>
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</li>
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</ol>
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</div>
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```
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## API
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### `remark().use(footnotes[, options])`
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Plugin to add support for footnotes.
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###### `options.inlineNotes`
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Whether to support `^[inline notes]` (`boolean`, default: `false`).
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###### Notes
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* Labels, such as `[^this]` (in a footnote reference) or `[^this]:` (in a
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footnote definition) cannot contain whitespace
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* Image and link references cannot start with carets, so `![^this doesn’t
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work][]`, and `[^neither does this][]`
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## Security
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Use of `remark-footnotes` does not involve [**rehype**][rehype]
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([**hast**][hast]) or user content so there are no openings for [cross-site
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scripting (XSS)][xss] attacks.
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## Related
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* [`remark-breaks`](https://github.com/remarkjs/remark-breaks)
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— More breaks
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* [`remark-frontmatter`](https://github.com/remarkjs/remark-frontmatter)
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— Frontmatter (yaml, toml, and more) support
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* [`remark-github`](https://github.com/remarkjs/remark-github)
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— References to issues, PRs, comments, users, etc
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* [`remark-math`](https://github.com/rokt33r/remark-math)
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— Inline and block math
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## Contribute
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See [`contributing.md`][contributing] in [`remarkjs/.github`][health] for ways
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to get started.
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See [`support.md`][support] for ways to get help.
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This project has a [code of conduct][coc].
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By interacting with this repository, organization, or community you agree to
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abide by its terms.
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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-footnotes/main.svg
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[build]: https://travis-ci.org/remarkjs/remark-footnotes
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[coverage-badge]: https://img.shields.io/codecov/c/github/remarkjs/remark-footnotes.svg
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[coverage]: https://codecov.io/github/remarkjs/remark-footnotes
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[downloads-badge]: https://img.shields.io/npm/dm/remark-footnotes.svg
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[downloads]: https://www.npmjs.com/package/remark-footnotes
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[size-badge]: https://img.shields.io/bundlephobia/minzip/remark-footnotes.svg
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[size]: https://bundlephobia.com/result?p=remark-footnotes
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[sponsors-badge]: https://opencollective.com/unified/sponsors/badge.svg
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[backers-badge]: https://opencollective.com/unified/backers/badge.svg
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[collective]: https://opencollective.com/unified
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[chat-badge]: https://img.shields.io/badge/chat-discussions-success.svg
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[chat]: https://github.com/remarkjs/remark/discussions
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[npm]: https://docs.npmjs.com/cli/install
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[health]: https://github.com/remarkjs/.github
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[contributing]: https://github.com/remarkjs/.github/blob/HEAD/contributing.md
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[support]: https://github.com/remarkjs/.github/blob/HEAD/support.md
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[coc]: https://github.com/remarkjs/.github/blob/HEAD/code-of-conduct.md
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[license]: license
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[author]: https://wooorm.com
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[remark]: https://github.com/remarkjs/remark
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[xss]: https://en.wikipedia.org/wiki/Cross-site_scripting
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[rehype]: https://github.com/rehypejs/rehype
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[hast]: https://github.com/syntax-tree/hast
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