: single;
};
## Anatomy
Dnd consists of three primary components that work together to create drag and drop interfaces.
1. **Drop Zone** - Active but not over
2. **Drop Zone** - Over and valid
3. **Drop Zone** - Over and invalid
4. **Sort Line**
5. **Handle**
## Options
Dnd supports the following configurations to accommodate various drag and drop scenarios.
### Drop Zone
```tsx lines theme={null}
import { Flex, Dnd } from "@servicetitan/anvil2";
function App() {
return (
Resting Drop Zone
Visible Drop Zone while dragging
Valid Drop Zone, user is over the Drop Zone
Invalid drop zone, user is over the Drop Zone
);
}
export default App;
```
Drop Zone displays different visual states based on drag conditions:
* **Active but not over** - Shows a dashed border when an item is being dragged but not over the drop zone
* **Over and valid** - Shows a solid border with success styling when a valid item is over the drop zone
* **Over and invalid** - Shows a dashed border with danger styling when an invalid item is over the drop zone
### Handle
```tsx lines theme={null}
import { Dnd } from "@servicetitan/anvil2";
function App() {
return ;
}
export default App;
```
The Handle displays an icon to indicate that an item is draggable. It can be configured to be decorative or interactive, depending on the use case.
### Sort Line
```tsx lines theme={null}
import { Dnd } from "@servicetitan/anvil2";
function App() {
return (
);
}
export default App;
```
```tsx lines theme={null}
import { Dnd } from "@servicetitan/anvil2";
function App() {
return (
);
}
export default App;
```
Sort Line indicates where an item will be dropped in a sortable list. The line width is based on its nearest relatively positioned ancestor. Use Sort Line for one-dimensional sorting in vertical or horizontal lists. Sort Line is not suitable for two-dimensional sorting such as grids.
## Usage Guidelines
Dnd is a collection of UI components, rather than a complete drag and drop solution. Additional work is needed in design to make it a complete drag and drop solution.
### When to Use
Use Dnd when you need:
* Custom drag and drop interactions not covered by DndSort
* Specific visual feedback for drag states
* Integration with external drag and drop libraries
* Fine-grained control over drag and drop behavior
### When not to use
Avoid using Dnd when:
* Basic sorting or grouping needs can be met by [Dnd Sort](/docs/web/components/dnd-sort/design)
* You need a complete drag and drop solution without implementing interactions yourself
### Alternatives
#### Dnd vs DndSort
DndSort is a pre-built composition that uses all Dnd components to cover many basic cases including sorting a list, arranging items into groups, or both. Use DndSort when it meets your needs. Use Dnd when you require custom drag and drop behavior beyond what DndSort provides.
#### Provide alternatives to Drag and Drop
While Dnd is keyboard navigable, alternative interactions should be provided for users who cannot or do not want to use drag and drop.
## Content
Content within Dnd components should clearly communicate drag and drop capabilities and provide appropriate visual feedback.
* Drop Zone content should indicate what can be dropped in the area
* Handle and Handle Button should be clearly visible and indicate draggability
* Sort Line should appear at the precise drop location to guide users
## Keyboard Interaction
Users can navigate Dnd components using standard keyboard controls.
Dnd components provide visual styling only and do not implement keyboard interactions. Implement keyboard navigation using your chosen drag and drop library or custom keyboard handlers to ensure accessibility.
