What’s this?

This package is a unified (rehype) plugin to add support for Obsidian callouts.

Issues and pull requests are welcomed!

for docs and preview, see website

Features

• [x] supports normal markdown syntax in titles and content.
• [x] supports all obsidian callout types
• [x] supports nested callouts.
• [x] foldable with sign + or -
• [x] a preset css make callouts look like obsidian

Installation

npm install rehype-callout

Usage

import { unified } from 'unified';
import remarkParse from 'remark-parse';
import remarkRehype from 'remark-rehype';
import rehypeStringify from 'rehype-stringify';

import callout from "rehype-callout";

const md = `>[!note] This is a **note** callout.  
> 你好!
> ## inner title
> This is the content!`;

const output = unified()
.use(remarkParse)
.use(remarkRehype)
.use(callout, {}) /* second param is custom config options */
.use(rehypeStringify)
.processSync(md);
console.log(String(output))

The generated HTML of the above code would be:

      <blockquote data-callout="note">
        <div class="callout-title">
            <div class="callout-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24"
                    fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
                    <line x1="18" y1="2" x2="22" y2="6"></line>
                    <path d="M7.5 20.5 19 9l-4-4L3.5 16.5 2 22z"></path>
                </svg></div>
            <div class="callout-title-inner">This is a<strong>note</strong>callout.</div>
        </div>
        <div class="callout-content">
            <p>你好!</p>
            <h2>inner title</h2>
            <p>This is the content!</p>
        </div>
    </blockquote>

in Astro:

//  astro.config.mjs
import rehypeCallout from 'rehype-callout';
// https://astro.build/config
export default defineConfig({
  // ...
  markdown:{
    rehypePlugins:[rehypeCallout],
  }
});

Configuration

export interface Config {
	/**
	 * Class names with prefix are embedded in the generated HTML,
	 * to avoid css confilict, customize the prefix.
	 * @default "callout"
	 */
	prefix: string;
	/**
	 * an Object that maps callout type to svg icon string.
	 * type must be lowercase.
	 * @example {info: '<svg>...</svg>', ...}
	 * @default see docs website.
	 */
	types: Record<string, string>;
	/**
	 * an svg icon string to indicate expandable
	 */
	expandIcon: string;
	/**
	 *  add more class names to the callout container
	 *  @example Undoing tailwindcss-typography by class "not-prose",
	 * ```js
		//  astro.config.mjs
		import rehypeCallout from 'rehype-callout';
		export default defineConfig({
			markdown:{
				rehypePlugins: [[rehypeCallout,{customClassNames:['not-prose']}]],
			}
		});
	```
	 */
	customClassNames: string[];
}

const defaultConfig: Config = {
	prefix: "callout",
	expandIcon: expandIcon,
	//types refer to https://help.obsidian.md/Editing+and+formatting/Callouts#Supported+types
	types: {
		note: pencilIcon,
		abstract: clipboardListIcon,
		summary: clipboardListIcon,
		tldr: clipboardListIcon,
		info: infoIcon,
		todo: checkCircleIcon,
		tip: flameIcon,
		hint: flameIcon,
		important: flameIcon,
		success: checkIcon,
		check: checkIcon,
		done: checkIcon,
		question: helpCircleIcon,
		help: helpCircleIcon,
		faq: helpCircleIcon,
		warning: alertTriangleIcon,
		attention: alertTriangleIcon,
		caution: alertTriangleIcon,
		failure: xIcon,
		missing: xIcon,
		fail: xIcon,
		danger: zapIcon,
		error: zapIcon,
		bug: bugIcon,
		example: listIcon,
		quote: quoteIcon,
		cite: quoteIcon,
	},
	customClassNames: [],
};

style callouts

Class names are embedded in the generated HTML, so you can style them in your CSS.

[!NOTE] to avoid css confilict, customize the prefix config option. by default, {prefix:"callout"}.

 <blockquote data-custom-prefix="note">
        <div class="custom-prefix-title">
            <div class="custom-prefix-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24"
                    viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round"
                    stroke-linejoin="round">
                    <line x1="18" y1="2" x2="22" y2="6"></line>
                    <path d="M7.5 20.5 19 9l-4-4L3.5 16.5 2 22z"></path>
                </svg></div>
            <div class="custom-prefix-title-inner">This is a<strong>note</strong>callout.</div>
        </div>
        <div class="custom-prefix-content">
            <p>你好!</p>
            <h2>inner title</h2>
            <p>This is the content!</p>
        </div>
    </blockquote>

a preset css file is provided in: node_modules/rehype-callout/callout.css
replace 'callout' with your custom prefix when don't use default prefix.

import  'rehype-callout/css'; 
@import 'rehype-callout/css';  /* in css file @import */

[!info] dark mode
surpport dark mode by css variables

[date-theme="dark"] [data-callout] {
...
}

reinventing wheels

• rehype-obsidian-callout
• remark-obsidian-callout

development

rehype is a plugin of unifiedjs ecosystem that work with HTML as structured data, named HAST。