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Add improved docs #900

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Add improved docs
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doc/plugins.md
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Add examples to `remark`
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227 changes: 3 additions & 224 deletions doc/getting-started.md
Original file line number Diff line number Diff line change
@@ -1,227 +1,6 @@
![remark][logo]

# Getting started

**remark** transforms markdown.
It’s an ecosystem of [plugins][].
If you get stuck, [issues][] and [Discussions][] are good places to get help.

It’s built on [unified][], make sure to read it and its [website][] too.

## Contents

* [Intro](#intro)
* [Command line](#command-line)
* [Using remark in a project](#using-remark-in-a-project)
* [Programmatic usage](#programmatic-usage)

## Intro

Out of the box, **remark** transforms markdown: markdown is given, reformatted,
and written:

```md
# Alpha #
Bravo charlie **delta** __echo__.
- Foxtrot
```

Yields:

```md
# Alpha

Bravo charlie **delta** **echo**.

* Foxtrot
```

But, much more can be done, [through plugins][plugins].

## Command line

**remark**’s CLI is a simple way to process markdown files from the
command line. Its interface is provided by [**unified-args**][unified-args].

Install [`remark-cli`][cli] and dependencies (in this case a [linting
preset][preset] and [`remark-html`][html]) with [npm][]:

```sh
npm install --global remark-cli remark-html remark-preset-lint-markdown-style-guide
```

`readme.md` contains:

```md
_Hello_.
```

Now, to process `readme.md`, run the following:

```sh
remark readme.md --use html --use preset-lint-markdown-style-guide
```

Yields:

```txt
<p><em>Hello</em>.</p>
readme.md.md
1:1-1:8 warning Emphasis should use `*` as a marker emphasis-marker remark-lint

⚠ 1 warning
```

## Using remark in a project

In the previous example, `remark-cli` was installed globally.
That’s generally a bad idea.
Here we’re going to use the CLI to lint an npm package.

Say we have the following `package.json`:

```json
{
"name": "my-package",
"version": "1.0.0",
"type": "module",
"scripts": {
"test": "node test.js"
}
}
```

And install `remark-cli`, `remark-html`, and
`remark-preset-lint-markdown-style-guide` into it as a dev-dependencies:

```sh
npm install --save-dev remark-cli remark-html remark-preset-lint-markdown-style-guide
```

The `--save-dev` option stores the dependencies in our `package.json`:

```diff
{
"name": "my-package",
"version": "1.0.0",
"type": "module",
+ "devDependencies": {
+ "remark-cli": "^10.0.0",
+ "remark-html": "^14.0.0",
+ "remark-preset-lint-markdown-style-guide": "^5.0.0"
+ },
"scripts": {
"test": "node test.js"
}
}
```

Then, we change our `test` script to include remark, and add
configuration:

```diff
{
"name": "my-package",
"version": "1.0.0",
"type": "module",
"devDependencies": {
"remark-cli": "^10.0.0",
"remark-html": "^14.0.0",
"remark-preset-lint-markdown-style-guide": "^5.0.0"
},
"scripts": {
- "test": "node test.js"
+ "test": "remark . --quiet --frail && node test.js"
+ },
+ "remarkConfig": {
+ "plugins": [
+ "preset-lint-markdown-style-guide",
+ "html"
+ ]
}
}
```

Now from the command line we can run:

```sh
npm test
```

This will lint all markdown files when we test the project.
[`--frail`][frail] ensures the command fails if a code-style violation
is found, and [`--quiet`][quiet] hides successful files from the report.

## Programmatic usage

The programmatic interface of **remark** is provided by
[**unified**][unified].
In fact, [`remark`][api] is two plugins: [`remark-parse`][parse] and
[`remark-stringify`][stringify].

Install [`remark`][api] and dependencies with [npm][]:

```sh
npm install vfile-reporter remark remark-html remark-preset-lint-markdown-style-guide
```

`index.js` contains:

```js
import {reporter} from 'vfile-reporter'
import {remark} from 'remark'
import remarkPresetLintMarkdownStyleGuide from 'remark-preset-lint-markdown-style-guide'
import remarkHtml from 'remark-html'

remark()
.use(remarkPresetLintMarkdownStyleGuide)
.use(remarkHtml)
.process('_Hello_.')
.then((file) => {
console.error(reporter(file))
console.log(String(file))
})
```

`node index.js` yields:

```txt
1:1-1:8 warning Emphasis should use `*` as a marker emphasis-marker remark-lint

⚠ 1 warning
<p><em>Hello</em>.</p>
```

<!-- Definitions -->

[logo]: https://raw.githubusercontent.com/remarkjs/remark/1f338e72/logo.svg?sanitize=true

[issues]: https://github.com/remarkjs/remark/issues

[discussions]: https://github.com/remarkjs/remark/discussions

[npm]: https://docs.npmjs.com/cli/install

[api]: https://github.com/remarkjs/remark/tree/main/packages/remark

[cli]: https://github.com/remarkjs/remark/tree/main/packages/remark-cli

[plugins]: https://github.com/remarkjs/remark/tree/main/doc/plugins.md

[unified]: https://github.com/unifiedjs/unified

[website]: https://unifiedjs.com

[unified-args]: https://github.com/unifiedjs/unified-args

[frail]: https://github.com/unifiedjs/unified-args#--frail

[quiet]: https://github.com/unifiedjs/unified-args#--quiet

[parse]: https://github.com/remarkjs/remark/tree/main/packages/remark-parse

[stringify]: https://github.com/remarkjs/remark/tree/main/packages/remark-stringify

[preset]: https://github.com/remarkjs/remark-lint/tree/HEAD/packages/remark-preset-lint-markdown-style-guide
See [the monorepo readme][remark] for what the remark ecosystem is and examples
of how to get started.

[html]: https://github.com/remarkjs/remark-html
[remark]: https://github.com/remarkjs/remark
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