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219 lines
5.9 KiB
Markdown
219 lines
5.9 KiB
Markdown
# mdast-util-to-string
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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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[mdast][] utility to get the text content of a node.
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## Contents
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* [What is this?](#what-is-this)
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* [When should I use this?](#when-should-i-use-this)
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* [Install](#install)
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* [Use](#use)
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* [API](#api)
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* [`toString(value[, options])`](#tostringvalue-options)
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* [`Options`](#options)
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* [Types](#types)
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* [Compatibility](#compatibility)
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* [Security](#security)
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* [Related](#related)
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* [Contribute](#contribute)
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* [License](#license)
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## What is this?
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This package is a tiny utility that gets the textual content of a node.
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## When should I use this?
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This utility is useful when you have a node, say a heading, and want to get the
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text inside it.
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This package does not serialize markdown, that’s what
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[`mdast-util-to-markdown`][mdast-util-to-markdown] does.
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Similar packages, [`hast-util-to-string`][hast-util-to-string] and
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[`hast-util-to-text`][hast-util-to-text], do the same but on [hast][].
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## Install
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This package is [ESM only][esm].
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In Node.js (version 16+), install with [npm][]:
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```sh
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npm install mdast-util-to-string
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```
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In Deno with [`esm.sh`][esmsh]:
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```js
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import {toString} from 'https://esm.sh/mdast-util-to-string@4'
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```
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In browsers with [`esm.sh`][esmsh]:
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```html
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<script type="module">
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import {toString} from 'https://esm.sh/mdast-util-to-string@4?bundle'
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</script>
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```
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## Use
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```js
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import {fromMarkdown} from 'mdast-util-from-markdown'
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import {toString} from 'mdast-util-to-string'
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const tree = fromMarkdown('Some _emphasis_, **importance**, and `code`.')
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console.log(toString(tree)) // => 'Some emphasis, importance, and code.'
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```
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## API
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This package exports the identifier [`toString`][api-to-string].
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There is no default export.
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### `toString(value[, options])`
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Get the text content of a node or list of nodes.
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Prefers the node’s plain-text fields, otherwise serializes its children,
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and if the given value is an array, serialize the nodes in it.
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###### Parameters
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* `value` (`unknown`)
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— thing to serialize, typically [`Node`][node]
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* `options` ([`Options`][api-options], optional)
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— configuration
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###### Returns
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Serialized `value` (`string`).
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### `Options`
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Configuration (TypeScript type).
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###### Fields
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* `includeImageAlt` (`boolean`, default: `true`)
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— whether to use `alt` for `image`s
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* `includeHtml` (`boolean`, default: `true`)
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— whether to use `value` of HTML
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## Types
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This package is fully typed with [TypeScript][].
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It exports the additional type [`Options`][api-options].
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## Compatibility
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Projects maintained by the unified collective are compatible with maintained
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versions of Node.js.
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When we cut a new major release, we drop support for unmaintained versions of
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Node.
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This means we try to keep the current release line, `mdast-util-to-string@^4`,
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compatible with Node.js 16.
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## Security
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Use of `mdast-util-to-string` does not involve **[hast][]**, user content, or
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change the tree, so there are no openings for [cross-site scripting (XSS)][xss]
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attacks.
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## Related
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* [`hast-util-to-string`](https://github.com/wooorm/rehype-minify/tree/main/packages/hast-util-to-string)
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— get text content in hast
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* [`hast-util-to-text`](https://github.com/syntax-tree/hast-util-to-text)
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— get text content in hast according to the `innerText` algorithm
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## Contribute
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See [`contributing.md`][contributing] in [`syntax-tree/.github`][health] for
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ways 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://github.com/syntax-tree/mdast-util-to-string/workflows/main/badge.svg
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[build]: https://github.com/syntax-tree/mdast-util-to-string/actions
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[coverage-badge]: https://img.shields.io/codecov/c/github/syntax-tree/mdast-util-to-string.svg
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[coverage]: https://codecov.io/github/syntax-tree/mdast-util-to-string
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[downloads-badge]: https://img.shields.io/npm/dm/mdast-util-to-string.svg
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[downloads]: https://www.npmjs.com/package/mdast-util-to-string
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[size-badge]: https://img.shields.io/badge/dynamic/json?label=minzipped%20size&query=$.size.compressedSize&url=https://deno.bundlejs.com/?q=mdast-util-to-string
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[size]: https://bundlejs.com/?q=mdast-util-to-string
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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/syntax-tree/unist/discussions
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[npm]: https://docs.npmjs.com/cli/install
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[esm]: https://gist.github.com/sindresorhus/a39789f98801d908bbc7ff3ecc99d99c
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[esmsh]: https://esm.sh
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[typescript]: https://www.typescriptlang.org
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[license]: license
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[author]: https://wooorm.com
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[health]: https://github.com/syntax-tree/.github
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[contributing]: https://github.com/syntax-tree/.github/blob/main/contributing.md
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[support]: https://github.com/syntax-tree/.github/blob/main/support.md
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[coc]: https://github.com/syntax-tree/.github/blob/main/code-of-conduct.md
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[mdast]: https://github.com/syntax-tree/mdast
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[mdast-util-to-markdown]: https://github.com/syntax-tree/mdast-util-to-markdown
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[hast]: https://github.com/syntax-tree/hast
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[hast-util-to-string]: https://github.com/rehypejs/rehype-minify/tree/main/packages/hast-util-to-string
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[hast-util-to-text]: https://github.com/syntax-tree/hast-util-to-text
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[node]: https://github.com/syntax-tree/mdast#nodes
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[xss]: https://en.wikipedia.org/wiki/Cross-site_scripting
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[api-to-string]: #tostringvalue-options
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[api-options]: #options
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