# remark-lint-hard-break-spaces [![Build][badge-build-image]][badge-build-url] [![Coverage][badge-coverage-image]][badge-coverage-url] [![Downloads][badge-downloads-image]][badge-downloads-url] [![Size][badge-size-image]][badge-size-url] [![Sponsors][badge-funding-sponsors-image]][badge-funding-url] [![Backers][badge-funding-backers-image]][badge-funding-url] [![Chat][badge-chat-image]][badge-chat-url] [`remark-lint`][github-remark-lint] rule to warn when spaces are used for hard breaks. Either optionally spaces at all, or more spaces than the needed 2. ## Contents * [What is this?](#what-is-this) * [When should I use this?](#when-should-i-use-this) * [Presets](#presets) * [Install](#install) * [Use](#use) * [API](#api) * [`unified().use(remarkLintHardBreakSpaces[, options])`](#unifieduseremarklinthardbreakspaces-options) * [`Options`](#options) * [Recommendation](#recommendation) * [Examples](#examples) * [Compatibility](#compatibility) * [Contribute](#contribute) * [License](#license) ## What is this? This package checks whitespace hard breaks. ## When should I use this? You can use this package to check that the spaces in hard breaks are consistent. ## Presets This plugin is included in the following presets: | Preset | Options | | - | - | | [`remark-preset-lint-markdown-style-guide`](https://github.com/remarkjs/remark-lint/tree/main/packages/remark-preset-lint-markdown-style-guide) | | | [`remark-preset-lint-recommended`](https://github.com/remarkjs/remark-lint/tree/main/packages/remark-preset-lint-recommended) | | ## Install This package is [ESM only][github-gist-esm]. In Node.js (version 16+), install with [npm][npm-install]: ```sh npm install remark-lint-hard-break-spaces ``` In Deno with [`esm.sh`][esm-sh]: ```js import remarkLintHardBreakSpaces from 'https://esm.sh/remark-lint-hard-break-spaces@4' ``` In browsers with [`esm.sh`][esm-sh]: ```html ``` ## Use On the API: ```js import remarkLint from 'remark-lint' import remarkLintHardBreakSpaces from 'remark-lint-hard-break-spaces' import remarkParse from 'remark-parse' import remarkStringify from 'remark-stringify' import {read} from 'to-vfile' import {unified} from 'unified' import {reporter} from 'vfile-reporter' const file = await read('example.md') await unified() .use(remarkParse) .use(remarkLint) .use(remarkLintHardBreakSpaces) .use(remarkStringify) .process(file) console.error(reporter(file)) ``` On the CLI: ```sh remark --frail --use remark-lint --use remark-lint-hard-break-spaces . ``` On the CLI in a config file (here a `package.json`): ```diff … "remarkConfig": { "plugins": [ … "remark-lint", + "remark-lint-hard-break-spaces", … ] } … ``` ## API This package exports no identifiers. It exports the [TypeScript][typescript] type [`Options`][api-options]. The default export is [`remarkLintHardBreakSpaces`][api-remark-lint-hard-break-spaces]. ### `unified().use(remarkLintHardBreakSpaces[, options])` Warn when more spaces are used than needed for hard breaks. ###### Parameters * `options` ([`Options`][api-options], default: `'consistent'`) — either a preferred indent or whether to detect the first style and warn for further differences ###### Returns Transform ([`Transformer` from `unified`][github-unified-transformer]). ### `Options` Configuration (TypeScript type). ###### Fields * `allowSpaces` (`boolean`, default: `true`) — allow trailing space hard breaks at all; use escape hard breaks otherwise ## Recommendation Less than two spaces do not create a hard breaks and more than two spaces have no effect. Due to this, it’s recommended to turn this rule on. With CommonMark, it is now possible to use a backslash (`\`) at the end of a line to create a hard break. It is now recommended to pass `allowSpaces: false`. ## Examples ##### `ok.md` ###### In ```markdown **Mercury** is the first planet from the Sun␠␠ and the smallest in the Solar System. **Venus** is the second planet from\ the Sun. ``` ###### Out No messages. ##### `not-ok.md` ###### In ```markdown **Mercury** is the first planet from the Sun␠␠␠ and the smallest in the Solar System. ``` ###### Out ```text 1:45-2:1: Unexpected `3` spaces for hard break, expected `2` spaces ``` ##### `escape.md` When configured with `{ allowSpaces: false }`. ###### In ```markdown **Mercury** is the first planet from the Sun␠␠ and the smallest in the Solar System. **Venus** is the second planet from the\ Sun. ``` ###### Out ```text 1:45-2:1: Unexpected `2` spaces for hard break, expected escape ``` ##### `containers.md` ###### In > 👉 **Note**: this example uses > GFM ([`remark-gfm`][github-remark-gfm]). ```markdown [^mercury]: > * > * **Mercury** is the first planet from the Sun␠␠␠ > > and the smallest in the Solar System. ``` ###### Out ```text 2:57-3:1: Unexpected `3` spaces for hard break, expected `2` spaces ``` ##### `not-ok-options.md` When configured with `'🌍'`. ###### Out ```text 1:1: Unexpected value `🌍` for `options`, expected object ``` ##### `not-ok-options-field.md` When configured with `{ allowSpaces: '🌍' }`. ###### Out ```text 1:1: Unexpected value `🌍` for `options.allowSpaces`, expected `boolean` ``` ## 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-lint-hard-break-spaces@4`, compatible with Node.js 16. ## Contribute See [`contributing.md`][github-dotfiles-contributing] in [`remarkjs/.github`][github-dotfiles-health] for ways to get started. See [`support.md`][github-dotfiles-support] for ways to get help. This project has a [code of conduct][github-dotfiles-coc]. By interacting with this repository, organization, or community you agree to abide by its terms. ## License [MIT][file-license] © [Titus Wormer][author] [api-options]: #options [api-remark-lint-hard-break-spaces]: #unifieduseremarklinthardbreakspaces-options [author]: https://wooorm.com [badge-build-image]: https://github.com/remarkjs/remark-lint/workflows/main/badge.svg [badge-build-url]: https://github.com/remarkjs/remark-lint/actions [badge-chat-image]: https://img.shields.io/badge/chat-discussions-success.svg [badge-chat-url]: https://github.com/remarkjs/remark/discussions [badge-coverage-image]: https://img.shields.io/codecov/c/github/remarkjs/remark-lint.svg [badge-coverage-url]: https://codecov.io/github/remarkjs/remark-lint [badge-downloads-image]: https://img.shields.io/npm/dm/remark-lint-hard-break-spaces.svg [badge-downloads-url]: https://www.npmjs.com/package/remark-lint-hard-break-spaces [badge-funding-backers-image]: https://opencollective.com/unified/backers/badge.svg [badge-funding-sponsors-image]: https://opencollective.com/unified/sponsors/badge.svg [badge-funding-url]: https://opencollective.com/unified [badge-size-image]: https://img.shields.io/bundlejs/size/remark-lint-hard-break-spaces [badge-size-url]: https://bundlejs.com/?q=remark-lint-hard-break-spaces [esm-sh]: https://esm.sh [file-license]: https://github.com/remarkjs/remark-lint/blob/main/license [github-dotfiles-coc]: https://github.com/remarkjs/.github/blob/main/code-of-conduct.md [github-dotfiles-contributing]: https://github.com/remarkjs/.github/blob/main/contributing.md [github-dotfiles-health]: https://github.com/remarkjs/.github [github-dotfiles-support]: https://github.com/remarkjs/.github/blob/main/support.md [github-gist-esm]: https://gist.github.com/sindresorhus/a39789f98801d908bbc7ff3ecc99d99c [github-remark-gfm]: https://github.com/remarkjs/remark-gfm [github-remark-lint]: https://github.com/remarkjs/remark-lint [github-unified-transformer]: https://github.com/unifiedjs/unified#transformer [npm-install]: https://docs.npmjs.com/cli/install [typescript]: https://www.typescriptlang.org