A markdown parser that renders into Svelte Components. Inspired by ReactMarkdown.

You can install it with

$ npm i -S svelte-markdown

If you use npm or if you prefer yarn

$ yarn add svelte-markdown

If you're using Sapper you might need to install it as a dev dependency.

<script>
  import SvelteMarkdown from 'svelte-markdown'
  const source = `
  # This is a header

This is a paragraph.

* This is a list
* With two items
  1. And a sublist
  2. That is ordered
    * With another
    * Sublist inside

| And this is | A table |
|-------------|---------|
| With two    | columns |`
</script>

<SvelteMarkdown {source} />

This would render something like

<h1>This is a header</h1>
<p>This is a paragraph.</p>
<ul>
  <li>This is a list</li>
  <li>
    With two items
    <ol start="1">
      <li>And a sublist</li>
      <li>
        That is ordered
        <ul>
          <li>With another</li>
          <li>Sublist inside</li>
        </ul>
      </li>
    </ol>
  </li>
</ul>
<table>
  <thead>
    <tr>
      <th>And this is</th>
      <th>A table</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>With two</td>
      <td>columns</td>
    </tr>
  </tbody>
</table>

Just like with React Markdown, this package doesn't use {@html ...} unless you need to render HTML.

The SvelteMarkdown component accepts the following options:

• source - string The Markdown source to be parsed.
• renderers - object (optional) An object where the keys represent a node type and the value is a Svelte component. This object will be merged with the default renderers. For now you can check how the default renderers are written in the source code at src/renderers.
• options - object (optional) An object containing options for Marked

A parsed event will be fired when the final tokens have been calculated, allowing you to access the raw token array if needed for things like generating Table of Contents from headings.

<script>
  import SvelteMarkdown from 'svelte-markdown'

  const source = `# This is a header`

  function handleParsed(event) {
    //access tokens via event.detail.tokens
    console.log(event.detail.tokens);
  }
</script>

<SvelteMarkdown {source} on:parsed={handleParsed}>

These would be the property names expected by the renderers option.

• text - Text rendered inside of other elements, such as paragraphs
• paragraph - Paragraph (<p>)
• em - Emphasis (<em>)
• strong - Strong/bold (<strong>)
• hr - Horizontal rule / thematic break (<hr>)
• blockquote - Block quote (<blockquote>)
• del - Deleted/strike-through (<del>)
• link - Link (<a>)
• image - Image (<img>)
• table - Table (<table>)
• tablehead - Table head (<thead>)
• tablebody - Table body (<tbody>)
• tablerow - Table row (<tr>)
• tablecell - Table cell (<td>/<th>)
• list - List (<ul>/<ol>)
• listitem - List item (<li>)
• heading - Heading (<h1>-<h6>)
• codespan - Inline code (<code>)
• code - Block of code (<pre><code>)
• html - HTML node

For fine detail styling of lists, it can be useful to differentiate between ordered and un-ordered lists. If either key is missing, the default listitem will be used. There are two optional keys in the renderers option which can provide this:

• orderedlistitem - A list item appearing inside an ordered list
• unorderedlistitem A list item appearing inside an un-ordered list

As an example, if we have an orderedlistitem:

<style>
  li::marker {
    color: blue;
  }
</style>

<li><slot></slot></li>

Then numbers at the start of ordered list items would be colored blue. Bullets at the start of unordered list items would remain the default text color.

To use inline markdown, you can assign the prop isInline to the component.

<SvelteMarkdown {source} isInline />

Some tests have been added to the tests folder. You can clone this repo and create another svelte app and link it to this repo to try modifying it.

You can clone this repo and do the following:

$ yarn
$ yarn link
$ yarn dev

This will watch all changes and make the project linkable. Now on the app you created you can link it with:

$ yarn link svelte-markdown

And then import it like in the example above.

As of now the only external dependency of this project is marked.

• ReactMarkdown - React library to render markdown using React components. Inspiration for this library.
• Svelte - JavaScript front-end framework.
• Marked - Markdown parser