Advanced Markdown Demo for Table of Contents

By John Doe on 9/10/2025

Category: Markdown, Demo, TOC

Tags: Astro, Markdown, TOC

Advanced Markdown Demo

This article is intentionally long and structured to test Table of Contents (TOC) generation and anchor navigation in Astro projects.

Table of Contents

• Introduction
• Getting Started
• Headings
  • Subheading Example
• Text Formatting
  • Emphasis
  • Blockquotes
• Lists
  • Unordered Lists
  • Ordered Lists
  • Nested Lists
• Links and Images
• Code Examples
  • Inline Code
  • Code Blocks
• Tables
• Horizontal Rules
• Task Lists
• Footnotes
• Admonitions
• Math
• Conclusion

Introduction

Welcome to this advanced Markdown demonstration article.
It is designed to showcase a wide variety of Markdown features and to provide a robust test for Table of Contents (TOC) navigation.

Getting Started

To use this article for TOC testing, simply render it in your Astro project and verify that all anchor links in the TOC work as expected.

Headings

Subheading Example

This is a subheading under Headings.

Deep Subheading

This is a deeper subheading for anchor testing.

Text Formatting

Emphasis

Italic text
Bold text
Bold and italic
Strikethrough

Blockquotes

This is a blockquote.

Nested blockquote for demonstration.

Lists

Unordered Lists

• Apple
• Banana
• Cherry

Ordered Lists

1. First
2. Second
3. Third

Nested Lists

• Item 1
  • Subitem 1.1
    • Subitem 1.1.1
  • Subitem 1.2
• Item 2

Links and Images

Astro Official Site

Code Examples

Inline Code

Use npm run dev to start the development server.

Code Blocks

function sum(a, b) {
  return a + b;
}
console.log(sum(2, 3));

git clone https://github.com/withastro/astro.git
cd astro
npm install

Tables

Horizontal Rules

Task Lists

• Write a long article
• Add many sections
• Test TOC navigation

Footnotes

Here is a reference to a footnote.¹

Admonitions

Note: This is a note admonition.

Warning: This is a warning admonition.

Math

Inline math: $a^2 + b^2 = c^2$

Block math:

$$ \sum_{i=1}^{n} i = \frac{n(n+1)}{2} $$

Conclusion

This article demonstrates a wide range of Markdown features and provides a thorough test for Table of Contents (TOC) anchor navigation in Astro.
Use it to verify that your TOC works correctly with many sections and subsections.