## Showcase

### Basic

<d-block-expandable title="Why hide this content?">

Use expandable blocks when the main section should stay concise but readers may still need more detail.

</d-block-expandable>

### Open by Default

<d-block-expandable title="Release checklist" open="true">

- Review breaking changes
- Update screenshots
- Run smoke tests

</d-block-expandable>

### Rich Content

<d-block-expandable title="Deployment appendix">

> [!TIP]
> Keep the primary flow in the main section and move optional details here.

```bash
npm install
npm run build
```

</d-block-expandable>