Parse code blocks in markdown files and run prettier on them
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README.md

prettier-markdown

Build Status NPM version

Prettier now includes support for prettifying Markdown (including code blocks!), so as such, I'd recommend using the official Prettier instead. See the release notes for more information

A simple utility and CLI to run prettier on code blocks within Markdown, leaving any non-code blocks untouched.

Currently works on the following languages (basically everything prettier supports!):

  • JavaScript
  • TypeScript
  • JSON
  • CSS
  • SASS
  • LESS
  • GraphQL

Install

yarn global add @dschau/prettier-markdown

Example

Prettier Markdown

Usage

CLI

Command line usage is simple. All options (besides --dry, which will not write files to disk) are passed directly through to prettier.

prettier-markdown src/**/*.md README.md --single-quote --trailing-comma es5

Programatically

prettierMarkdown(files, prettierOpts = {}, programOpts = {})

Usage is fairly simple. An array of markdown files are passed, as well as any prettier options, and prettier is run on the specified files.

const path = require('path');
const { prettierMarkdown } = require('@dschau/prettier-markdown');

prettierMarkdown(
  ['README.md', 'blog/posts/2017-01-01-hello-world/index.md'].map(file =>
    path.join(process.cwd(), file)
  )
).then(files => {
  // array of files that were written
});

Advanced Functionality

Line highlights

Note that line highlights (e.g. like the below) are kept intact and the block is still prettified!

```javascript {1-2}
const a =   'b';
const b =   'c';

  alert('hello world');
```

Frontmatter

Frontmatter, i.e. in a Gastby blog post, is preserved as authored.

---
title: Hello World
tags:
  - Some Tag
  - Another Tag
---

```javascript
// this will be prettified
var a =    'a';

```