Markdown Extended Features

📅 2026-06-12 | 📂 Markdown

Introduction

Extended Markdown features go beyond basic syntax. These include footnotes, definition lists, math expressions, and collapsible sections supported by various parsers.

Footnotes

# Supported by many parsers
This has a footnote[^1].

Another footnote[^note].

[^1]: This is the first footnote.
[^note]: This is a named footnote.

Definition Lists

# Supported by PHP Markdown Extra and Pandoc
Term 1
:   Definition for term 1

Term 2
:   Definition for term 2
:   Another definition for term 2

Collapsible Sections (HTML)

<details>
<summary>Click to expand</summary>

Hidden content goes here.

This can include **Markdown** formatting.

</details>

Math Expressions

# KaTeX or MathJax support
Inline math: $E = mc^2$

Block math:
$$
sum_{i=1}^{n} i = frac{n(n+1)}{2}
$$

Mermaid Diagrams

```mermaid
graph LR
    A --> B{Decision}
    B -->|Yes| C
    B -->|No| D
```

Summary

Extended Markdown features vary by parser. Footnotes, math, diagrams, and collapsible sections enhance documentation. Check your platform's supported extensions.

YouTip