ANIMATION & MDX

Showcase

Explore interactive animations and MDX reading tools, with syntax you can copy into your writing

01 / INTERACTIVETheatre.js model ↗

Scrub through a request timeline

Keyframes and state stay connected while the reader controls position and speed

Animation progress

Playback speed

02 / RENDEREDMotion Canvas model ↗

Explain a request lifecycle as scenes

Code-authored scenes render against a deterministic timeline and loop as one composition

Autoplay scene

Both demos are lightweight SVG prototypes for this page, showing each tool's authoring model and boundary

MDX reading tools and syntax

Try each preview and copy its MDX source into your writing.

Highlight

Mark a key phrase readers will want to find again.

Preview

The key idea is preserving the result when a request is retried.

highlight.mdx


The key idea is <mark>preserving the result when a request is retried</mark>.

Authoring note: Keep highlights short and meaningful without color. The ==highlight== syntax is unsupported.

Five GitHub alerts

Distinguish notes, tips, important information, warnings, and cautions with titles and icons.

Preview

alerts.mdx


> [!NOTE]
> This setting applies to the entire project.

> [!TIP]
> Check the current state before making changes.

> [!IMPORTANT]
> Back up the existing configuration first.

> [!WARNING]
> Running jobs may be interrupted.

> [!CAUTION]
> Deleted data may not be recoverable.

Authoring note: Put an uppercase marker alone on the first line of a blockquote. These alerts are grouped for comparison; use only the ones a real article needs.

Expandable explanation

Let readers choose additional detail without interrupting the main explanation.

Preview

Why store the request identifier?

Return the previous result when the same request arrives again. See idempotency.

details.mdx


<details>
<summary>Why store the request identifier?</summary>

Return the previous result when the same request arrives again. See [idempotency](#showcase-en-glossary-idempotency).

</details>

Authoring note: Place summary first and leave blank lines around Markdown. Keep essential conclusions and warnings outside collapsed content.

Definitions and links

Jump directly to the definition of a recurring term.

Preview

Read the definition of idempotency.

Idempotency: Repeating an operation has the same effect as performing it once.

glossary.mdx


Read the definition of [idempotency](#showcase-en-glossary-idempotency).

<dl>
    <dt id="showcase-en-glossary-idempotency">Idempotency</dt>
    <dd>Repeating an operation has the same effect as performing it once.</dd>
</dl>

Authoring note: Update the id and link together and use a prefix unique within the document.

Code highlights, line numbers, and notes

Connect the code lines that matter with their explanation.

Preview

request-key.ts

const userId = "reader";
const requestId = "request-1";
const key = userId + ":" + requestId;

Lines 1–2
Identify the user and request.
Line 3
Combine both identifiers. A production implementation also needs expiry and concurrency handling.

code.mdx


<CodeExample>

```ts title="request-key.ts" lineNumbers
const userId = "reader";
const requestId = "request-1";
const key = userId + ":" + requestId; // [!code highlight]
```

<CodeNotes>
    <CodeNote lines="Lines 1–2">Identify the user and request.</CodeNote>
    <CodeNote lines="Line 3">
        Combine both identifiers. A production implementation also needs expiry
        and concurrency handling.
    </CodeNote>
</CodeNotes>

</CodeExample>

Authoring note: Update CodeNote lines whenever code changes. Preserve title, lineNumbers, and annotation comments in the fence.

Before, after, and diff

Compare the effect of a change under the same conditions.

Preview

Before and after

Before

Using only the user identifier conflates different requests.

After

Include the request identifier to distinguish operations.

key-change.ts

const key = userId; 
const key = userId + ":" + requestId;

comparison.mdx


<Comparison title="Before and after">
    <ComparisonItem title="Before">
        Using only the user identifier conflates different requests.
    </ComparisonItem>
    <ComparisonItem title="After">
        Include the request identifier to distinguish operations.
    </ComparisonItem>
</Comparison>

<CodeExample>

```ts title="key-change.ts"
const key = userId; // [!code --]
const key = userId + ":" + requestId; // [!code ++]
```

</CodeExample>

Authoring note: Give each item a specific title and explain changes with text and +/− markers as well as color.

Example and counterexample

Explain the conditions for success alongside a reason for failure.

Preview

Example and counterexample

Example

Reuse the identifier when retrying the same request.

Counterexample

Generating a new identifier on every retry creates a different request.

examples.mdx


<Comparison title="Example and counterexample">
    <ComparisonItem title="Example">
        Reuse the identifier when retrying the same request.
    </ComparisonItem>
    <ComparisonItem title="Counterexample">
        Generating a new identifier on every retry creates a different request.
    </ComparisonItem>
</Comparison>

Authoring note: Compare the same inputs and conditions. Use a table for three or more alternatives.

Expected result and verification

Pair the expected output with checks readers can perform.

Preview

Expected result and verification

Expected key

reader:request-1

Check that retrying the request produces the same key.
Check that a different request produces a different key.

expected-result.mdx


<ExpectedResult title="Expected result and verification">

```text title="Expected key"
reader:request-1
```

1. Check that retrying the request produces the same key.
2. Check that a different request produces a different key.

</ExpectedResult>

Authoring note: An expected result does not certify a passing test. State how the inputs should relate to the output.