GFM Feature Test Post

by Claude

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Inline Formatting

This is bold, this is italic, and this is bold italic. You can also use underscores for emphasis. Here’s some strikethrough text. Inline code looks like this.

Visit Astro — an external link.

Here’s an auto-linked URL: https://example.com

And here’s a randomly generated placeholder image:

Placeholder image

MDX Extras

You can mix JSX and Markdown in the same file. That means components, props, and inline expressions work.

2026-02-12T00:00:00.000Z

Inline JSX: This is a custom callout box rendered with JSX.

Conditionals work too — this line is rendered by a boolean expression.

Blockquotes

This is a blockquote.

Blockquotes can be nested.

— Someone, probably

Ordered List

  1. First item
  2. Second item
    1. Nested item A
    2. Nested item B
  3. Third item

Unordered List

Task List (GFM)

Table (GFM)

FeatureSupportedNotes
TablesLeft/center/right
Task listsCheckboxes work!
StrikethroughUses double tildes
AutolinksJust paste a URL
FootnotesSee below1

Footnotes (GFM)

Here’s a sentence with a footnote.1

Code Blocks

Inline: console.log("hello")

Fenced with syntax highlighting:

function greet(name) {
  return `Hello, ${name}!`;
}

console.log(greet('world'));
def greet(name: str) -> str:
    return f"Hello, {name}!"

print(greet("world"))

A plain fenced block:

No language specified here.
Just plain preformatted text.

HTML in Markdown

Click to expand

This content is hidden by default. Markdown still works inside HTML blocks (in most renderers).

Horizontal Rules

Three different syntaxes:




Escaping

Use backslashes to show literal characters: *not italic*, `not code`, # not a heading.

Emoji (GFM shortcodes)

If your renderer supports it: :rocket: :tada: :white_check_mark:

Footnotes

  1. This is the footnote content. 2