Source References
This fixture is derived from the feature categories listed in the Markdown Guide cheat sheet, the Markdown Guide extended syntax reference, and the CommonMark 0.31.2 spec. CommonMark describes its examples as conformance tests, while Markdown Guide separates basic syntax from extended syntax that not every processor supports.
Supported Feature Matrix
- Headings from level one through level six
- Paragraphs with soft-wrapped source lines
- Links using inline destination syntax
- Strong and italic emphasis
- Inline code spans
- Ordered, unordered, and nested lists
- Blockquotes with inline formatting
- Horizontal rules
- Fenced code blocks with a language info string
- Long words and long links that should stay inside the viewport
- Pipe tables with responsive overflow
- Task lists with non-interactive checkbox UI
- Footnote references and definitions
- Definition lists
- Heading IDs
- Images with responsive containment
- Strikethrough, highlight, subscript, superscript, and autolinks
Heading Levels
Level One Heading
Level Two Heading
Level Three Heading
Level Four Heading
Level Five Heading
Level Six Heading
Paragraphs And Inline Syntax
This paragraph checks normal body rhythm, a source link, strong emphasis, italic emphasis, and inline code inside one sentence.
This paragraph is split across multiple source lines so the renderer can prove that soft-wrapped prose joins into a readable paragraph without preserving accidental line breaks.
Ordered And Unordered Lists
- Basic unordered item
- Unordered item with strong text
- Nested unordered child
- Nested unordered child with a link
- Final unordered item
- Basic ordered item
- Ordered item with italic text
- Nested ordered child
- Nested ordered child with
inline code
- Final ordered item
Blockquote
A blockquote can include strong text, italic text, and a link. The second quoted line should stay in the quote rhythm.
Fenced Code Block
type MarkdownFeature = {
name: string;
source: "Markdown Guide" | "CommonMark";
supported: boolean;
};Extended Syntax Probes
The Markdown Guide extended syntax reference lists features such as tables, footnotes, heading IDs, definition lists, strikethrough, task lists, emoji shortcodes, highlight, subscript, superscript, and automatic URL linking. This route now renders the accepted features as real syntax probes.
Pipe Table
| Feature | Renderer Status | Alignment Probe |
|---|---|---|
| Tables | Rendered through MarkdownTable | Right |
| Task lists | Rendered through task markers | 42 |
| Footnotes | Rendered through references and backmatter | 7 |
Task List
- Completed task marker renders as checked
- Incomplete task marker renders as unchecked
- Task items can include strong text and links
Footnotes
Definition List
- Markdown component registry
- The UI layer in
MarkdownComponents.tsxthat owns renderer styling. - Parser boundary
- The parser and inline tokenizer in
markdown.tsxthat create structured blocks and inline tokens.
Inline Extended Syntax
This paragraph checks strikethrough text, highlighted text, H2O, X2, and bare autolinks with trailing punctuation: https://www.markdownguide.org. It also checks https://commonmark.org, plus a parenthesized URL (https://spec.commonmark.org/0.31.2/).
Image Syntax
Explicitly Unsupported Extended Features
- Unsupported emoji shortcode syntax:
:sparkles:
Emoji shortcode conversion remains unsupported by human decision because it needs a mapping policy.
Overflow Stress
LongInlineWordValidationLongInlineWordValidationLongInlineWordValidationLongInlineWordValidationLongInlineWordValidation should wrap or remain contained without widening the viewport.
Long source link label Long source link label Long source link label should stay contained and remain clickable.
Completion
If this page renders without crashes, unexpected horizontal overflow, or broken contact-copy side effects, the shared renderer has a Blog article review surface that covers more than the fixed brand article alone.
Footnotes
- Footnotes render after the document content and link back to the reference. ↩
