Code Blocks to HTML

Fenced Code Blocks (No Language)

Markdown

function test() {
  console.log("notice the blank line before this function?");
}

Parsed HTML

<pre><code>
function test() {
  console.log("notice the blank line before this function?");
}
</code></pre>

GitHub Tip Callout

Markdown

> [!TIP]
> To preserve your formatting within a list, make sure to indent non-fenced code blocks by eight spaces.

Parsed HTML (GitHub-specific)

<blockquote class="markdown-alert markdown-alert-tip">
  <p><strong>Tip</strong></p>
  <p>To preserve your formatting within a list, make sure to indent non-fenced code blocks by eight spaces.</p>
</blockquote>

Showing Backticks Inside Code Blocks

Markdown

    ````
    ```
    Look! You can see my backticks.
    ```
    ````

Parsed HTML

    <pre><code>
    ```

    Look! You can see my backticks.

    ```
    </code></pre>

Syntax Highlighting (Language Identifier)

Markdown

require 'redcarpet'
markdown = Redcarpet.new("Hello World!")
puts markdown.to_html

Parsed HTML

<pre><code class="language-ruby">
require 'redcarpet'
markdown = Redcarpet.new("Hello World!")
puts markdown.to_html
</code></pre>

The language-ruby class is consumed by GitHub’s syntax highlighter (Linguist + grammar).

Summary: Syntax-Highlighting Rules (HTML-Level)

HTML Comments (Ignored by Renderer)

<!-- Internal documentation comment -->

<!-- Internal documentation comment -->

Links

[About writing and formatting on GitHub](https://docs.github.com/...)

<a href="https://docs.github.com/...">About writing and formatting on GitHub</a>

Lists

* [GitHub Flavored Markdown Spec](https://github.github.com/gfm/)

<ul>
  <li>
    <a href="https://github.github.com/gfm/">GitHub Flavored Markdown Spec</a>
  </li>
</ul>

Diagrams (Conceptual Parsing)

Markdown

```mermaid
graph TD
  A --> B
```

Parsed HTML

<pre><code class="language-mermaid">
graph TD
  A --> B
</code></pre>

Closing Notes

• No language-* class appears here because no language identifier was provided.
• The inner triple backticks are preserved as literal text inside <code>.