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mdast-normalize-headings\n\n[![Build][build-badge]][build]\n[![Coverage][coverage-badge]][coverage]\n[![Downloads][downloads-badge]][downloads]\n[![Size][size-badge]][size]\n[![Sponsors][sponsors-badge]][collective]\n[![Backers][backers-badge]][collective]\n[![Chat][chat-badge]][chat]\n\n[mdast][] utility to normalize heading depths.\n\n## Contents\n\n*   [What is this?](#what-is-this)\n*   [When should I use this?](#when-should-i-use-this)\n*   [Install](#install)\n*   [Use](#use)\n*   [API](#api)\n    *   [`normalizeHeadings(tree)`](#normalizeheadingstree)\n*   [Types](#types)\n*   [Compatibility](#compatibility)\n*   [Security](#security)\n*   [Related](#related)\n*   [Contribute](#contribute)\n*   [License](#license)\n\n## What is this?\n\nThis package is a utility that normalizes the heading structure of documents.\nIt makes sure one top-level heading is used by adjusting headings depths\naccordingly.\n\n## When should I use this?\n\nThis utility can be useful when working with tools that assume that there is a\nsingle top-level heading that contains some meta-information (usually a title)\nabout the document.\n\nA plugin, [`remark-normalize-headings`][remark-normalize-headings], exists that\ndoes the same but for [remark][].\n\n## Install\n\nThis package is [ESM only][esm].\nIn Node.js (version 16+), install with [npm][]:\n\n```sh\nnpm install mdast-util-normalize-headings\n```\n\nIn Deno with [`esm.sh`][esmsh]:\n\n```js\nimport {normalizeHeadings} from 'https://esm.sh/mdast-util-normalize-headings@4'\n```\n\nIn browsers with [`esm.sh`][esmsh]:\n\n```html\n\u003cscript type=\"module\"\u003e\n  import {normalizeHeadings} from 'https://esm.sh/mdast-util-normalize-headings@4?bundle'\n\u003c/script\u003e\n```\n\n## Use\n\n```js\nimport {normalizeHeadings} from 'mdast-normalize-headings'\nimport {u} from 'unist-builder'\n\nconst tree = u('root', [\n  u('heading', {depth: 1}, [u('text', 'title')]),\n  u('heading', {depth: 2}, [u('text', 'description')]),\n  u('heading', {depth: 1}, [u('text', 'example')])\n])\n\nnormalizeHeadings(tree)\n\nconsole.log(tree)\n```\n\nYields:\n\n```js\n{\n  type: 'root',\n  children: [\n    {type: 'heading', depth: 1, children: [Array]},\n    {type: 'heading', depth: 3, children: [Array]},\n    {type: 'heading', depth: 2, children: [Array]}\n  ]\n}\n```\n\n## API\n\nThis package exports the identifier\n[`normalizeHeadings`][api-normalizeheadings].\nThere is no default export.\n\n### `normalizeHeadings(tree)`\n\nMake sure that there is only one top-level heading in the document by adjusting\nheadings depths accordingly.\n\n###### Parameters\n\n*   `tree` ([`Node`][node])\n    — tree to change\n\n###### Returns\n\nNothing (`undefined`).\n\n## Types\n\nThis package is fully typed with [TypeScript][].\nIt exports no additional types.\n\n## Compatibility\n\nProjects maintained by the unified collective are compatible with maintained\nversions of Node.js.\n\nWhen we cut a new major release, we drop support for unmaintained versions of\nNode.\nThis means we try to keep the current release line,\n`mdast-normalize-headings@^4`, compatible with Node.js 16.\n\n## Security\n\nUse of `mdast-normalize-headings` does not involve **[hast][]** so there are no\nopenings for [cross-site scripting (XSS)][xss] attacks.\n\n## Related\n\n*   [`remark-normalize-headings`][remark-normalize-headings]\n    — remark plugin\n\n## Contribute\n\nSee [`contributing.md`][contributing] in [`syntax-tree/.github`][health] for\nways to get started.\nSee [`support.md`][support] for ways to get help.\n\nThis project has a [code of conduct][coc].\nBy interacting with this repository, organization, or community you agree to\nabide by its terms.\n\n## License\n\n[MIT][license] © Eugene Sharygin\n\n\u003c!-- Definitions --\u003e\n\n[build-badge]: https://github.com/syntax-tree/mdast-normalize-headings/workflows/main/badge.svg\n\n[build]: https://github.com/syntax-tree/mdast-normalize-headings/actions\n\n[coverage-badge]: https://img.shields.io/codecov/c/github/syntax-tree/mdast-normalize-headings.svg\n\n[coverage]: https://codecov.io/github/syntax-tree/mdast-normalize-headings\n\n[downloads-badge]: https://img.shields.io/npm/dm/mdast-normalize-headings.svg\n\n[downloads]: https://www.npmjs.com/package/mdast-normalize-headings\n\n[size-badge]: https://img.shields.io/badge/dynamic/json?label=minzipped%20size\u0026query=$.size.compressedSize\u0026url=https://deno.bundlejs.com/?q=mdast-normalize-headings\n\n[size]: https://bundlejs.com/?q=mdast-normalize-headings\n\n[sponsors-badge]: https://opencollective.com/unified/sponsors/badge.svg\n\n[backers-badge]: https://opencollective.com/unified/backers/badge.svg\n\n[collective]: https://opencollective.com/unified\n\n[chat-badge]: https://img.shields.io/badge/chat-discussions-success.svg\n\n[chat]: https://github.com/syntax-tree/unist/discussions\n\n[npm]: https://docs.npmjs.com/cli/install\n\n[esm]: https://gist.github.com/sindresorhus/a39789f98801d908bbc7ff3ecc99d99c\n\n[esmsh]: https://esm.sh\n\n[typescript]: https://www.typescriptlang.org\n\n[license]: license\n\n[health]: https://github.com/syntax-tree/.github\n\n[contributing]: https://github.com/syntax-tree/.github/blob/main/contributing.md\n\n[support]: https://github.com/syntax-tree/.github/blob/main/support.md\n\n[coc]: https://github.com/syntax-tree/.github/blob/main/code-of-conduct.md\n\n[xss]: https://en.wikipedia.org/wiki/Cross-site_scripting\n\n[hast]: https://github.com/syntax-tree/hast\n\n[mdast]: https://github.com/syntax-tree/mdast\n\n[node]: https://github.com/syntax-tree/mdast#node\n\n[remark]: https://github.com/remarkjs/remark\n\n[remark-normalize-headings]: https://github.com/remarkjs/remark-normalize-headings\n\n[api-normalizeheadings]: #normalizeheadingstree\n","funding_links":["https://github.com/sponsors/unifiedjs","https://opencollective.com/unified"],"categories":["mdast 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