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Markdown renderer for Hexo
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README.md

hexo-renderer-marked

Build Status NPM version Coverage Status NPM Dependencies NPM DevDependencies

Add support for Markdown. This plugin uses marked as its render engine.

Installation

$ npm install hexo-renderer-marked --save
  • Hexo 4: >= 2.0
  • Hexo 3: >= 0.2
  • Hexo 2: 0.1.x

Options

You can configure this plugin in _config.yml.

marked:
  gfm: true
  pedantic: false
  breaks: true
  smartLists: true
  smartypants: true
  modifyAnchors: 0
  autolink: true
  sanitizeUrl: false
  headerIds: true
  prependRoot: false
  external_link:
    enable: false
    exclude: []
    nofollow: false
  • gfm - Enables GitHub flavored markdown
  • pedantic - Conform to obscure parts of markdown.pl as much as possible. Don't fix any of the original markdown bugs or poor behavior.
  • breaks - Enable GFM line breaks. This option requires the gfm option to be true.
  • smartLists - Use smarter list behavior than the original markdown.
  • smartypants - Use "smart" typograhic punctuation for things like quotes and dashes.
  • modifyAnchors - Transform the anchorIds into lower case (1) or upper case (2).
  • autolink - Enable autolink for URLs. E.g. https://hexo.io will become <a href="https://hexo.io">https://hexo.io</a>.
  • sanitizeUrl - Remove URLs that start with javascript:, vbscript: and data:.
  • headerIds - Insert header id, e.g. <h1 id="value">text</h1>. Useful for inserting anchor link to each paragraph with a heading.
  • prependRoot - Prepend root value to (internal) image path.
    • Example _config.yml:
    root: /blog/
    • ![text](/path/to/image.jpg) becomes <img src="/blog/path/to/image.jpg" alt="text">
  • external_link
    • enable - Open external links in a new tab.
    • exclude - Exclude hostname. Specify subdomain when applicable, including www.
      • Example: [foo](http://bar.com) becomes <a href="http://bar.com" target="_blank" rel="noopener">foo</a>
    • nofollow - Add rel="noopener external nofollow noreferrer" to all external links for security, privacy and SEO. Read more. This can be enabled regardless of external_link.enable
      • Example: [foo](http://bar.com) becomes <a href="http://bar.com" rel="noopener external nofollow noreferrer">foo</a>

Extras

Definition/Description Lists

hexo-renderer-marked also implements description/definition lists using the same syntax as PHP Markdown Extra.

This Markdown:

Definition Term
:    This is the definition for the term

will generate this HTML:

<dl>
  <dt>Definition Term</dt>
  <dd>This is the definition for the term</dd>
</dl>

Note: There is currently a limitation in this implementation. If multiple definitions are provided, the rendered HTML will be incorrect.

For example, this Markdown:

Definition Term
:    Definition 1
:    Definition 2

will generate this HTML:

<dl>
  <dt>Definition Term<br>: Definition 1</dt>
  <dd>Definition 2</dd>
</dl>

If you've got ideas on how to support multiple definitions, please provide a pull request. We'd love to support it.

Extensibility

This plugin overrides some default behaviours of how marked plugin renders the markdown into html, to integrate with the Hexo ecosystem. It is possible to override this plugin too, without resorting to forking the whole thing.

For example, to override how heading like # heading text is rendered:

hexo.extend.filter.register('marked:renderer', function(renderer) {
  const { config } = this; // Skip this line if you don't need user config from _config.yml
  renderer.heading = function(text, level) {
    // Default behaviour
    // return `<h${level}>${text}</h${level}>`;
    // outputs <h1>heading text</h1>

    // If you want to insert custom class name
    return `<h${level} class="headerlink">${text}</h${level}>`;
    // outputs <h1 class="headerlink">heading text</h1>
  }
})

Save the file in "scripts/" folder and run Hexo as usual.

Notice renderer.heading = function (text, level) { corresponds to this line. Refer to renderer.js on how this plugin overrides the default methods. For other methods not covered by this plugin, refer to marked's documentation.

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