ab-dnd-kit-sortable-tree
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# dnd-kit-sortable-tree
[](https://www.npmjs.org/package/dnd-kit-sortable-tree) [](https://www.npmjs.org/package/dnd-kit-sortable-tree) [](https://opensource.org/licenses/MIT)
This is a Tree component extracted from [dndkit](https://github.com/clauderic/dnd-kit) examples and abstracted a bit.
Here's how it could look like (visuals are completely customizable via css though)
[](https://shaddix.github.io/dnd-kit-sortable-tree)
Play around in [examples](https://shaddix.github.io/dnd-kit-sortable-tree) to check the API and see what it can do.
## Install
npm install dnd-kit-sortable-tree @dnd-kit/core @dnd-kit/sortable @dnd-kit/utilities
## How-to use
Check out the Storybook for code samples and play around. You could also play with it on [playcode](https://playcode.io/1032571)
Shortly, you need to render:
```tsx
<SortableTree
items={/* array of your tree items */}
onItemsChanged={/* callback when items are reordered */}
TreeItemComponent={/* component that renders a single tree item */}
/>
```
And `TreeItemComponent` is usually your data wrapped in `SimpleTreeItemWrapper` or `FolderTreeItemWrapper`:
```tsx
React.forwardRef((props, ref) => (
<SimpleTreeItemWrapper {...props} ref={ref}>
<div>{props.item.value}</div>
</SimpleTreeItemWrapper>
));
```
Note that wrapping in `forwardRef` and passing `ref` to `SimpleTreeItemWrapper` is very important!
## Examples
1. Here's the very minimal code to add a Sortable Tree. You shouldn't use it as is in your project, but it could be easier to grasp what's going on.
```jsx
export const Minimal = () => {
const [items, setItems] = useState(initialMinimalData);
return (
<SortableTree
items={items}
onItemsChanged={setItems}
{
/*
* You need to pass the component rendering a single item via TreeItemComponent props.
* This component will receive the data via `props.item`.
* In this example we inline the component, but in reality you should extract it into a const.
*/ ...{}
}
TreeItemComponent={React.forwardRef((props, ref) => (
<SimpleTreeItemWrapper {...props} ref={ref}>
{/* HERE GOES THE ACTUAL CONTENT OF YOUR COMPONENT */}
<div>{props.item.id}</div>
</SimpleTreeItemWrapper>
))}
/>
);
};
/*
* Configure the tree data.
*/
const initialMinimalData = [
{ id: '1', children: [{ id: '4' }, { id: '5' }] },
{ id: '2' },
{ id: '3' },
];
```
2. Here's the minimal viable example that you could potentially copy&paste to your project to start from.
```tsx
export const MinimalViable = () => {
const [items, setItems] = useState(initialViableMinimalData);
return (
<SortableTree
items={items}
onItemsChanged={setItems}
TreeItemComponent={MinimalTreeItemComponent}
/>
);
};
type MinimalTreeItemData = {
value: string;
};
/*
* Here's the component that will render a single row of your tree
*/
const MinimalTreeItemComponent = React.forwardRef<
HTMLDivElement,
TreeItemComponentProps<MinimalTreeItemData>
>((props, ref) => (
/* you could also use FolderTreeItemWrapper if you want to show vertical lines. */
<SimpleTreeItemWrapper {...props} ref={ref}>
<div>{props.item.value}</div>
</SimpleTreeItemWrapper>
));
/*
* Configure the tree data.
*/
const initialViableMinimalData: TreeItems<MinimalTreeItemData> = [
{
id: '1',
value: 'Jane',
children: [
{ id: '4', value: 'John' },
{ id: '5', value: 'Sally' },
],
},
{ id: '2', value: 'Fred', children: [{ id: '6', value: 'Eugene' }] },
{ id: '3', value: 'Helen', canHaveChildren: false },
];
```
## API
### Data configuration (each TreeItem element could define them):
- `canHaveChildren` - Default: `true`. If set to `false`, prevents any node from being dragged into the current one
- `disableSorting` - Default: `false`. If set to `true`, prevents node from being dragged (i.e. it can't be sorted or moved to another node)
### Tree configuration (props of `<SortableTree>`)
- `items` - _mandatory_, items shown in a tree
- `onItemsChanged` - _mandatory_, callback that is called when dragging of certain item is finished. You should preserve new state and adjust the value of `items` prop as needed.
- `TreeItemComponent` - _mandatory_, component that renders a single tree row.
- `indentationWidth` - _optional_, padding used for children
- `disableSorting` - _optional_, you could set this to `true` to completely disable the sorting
### TreeItemWrapper configuration (props of `<SimpleTreeItemWrapper>` and `<FolderTreeItemWrapper>`)
- `manualDrag` - Default: `false`. Set to `true` if you want tree item to be draggable ONLY from dragHandle.
- `showDragHandle` - _optional_, set to `false` if you want to hide default dragHandle and show your own instead. Use `<div {...props.handleProps}>DRAG_ME</div>` for your own drag handle.
# Troubleshooting
1. If your dragged item is shown at the end of a list, make sure you that:
1. You wrapped your `TreeItem` component in `React.forwardRef` and passing the `ref` to `SimpleTreeItemWrapper`
1. You pass the `styles` prop from `TreeItem` to `SimpleTreeItemWrapper`