## API Report File for "@atlaskit/tree"

> Do not edit this file. It is a report generated by [API Extractor](https://api-extractor.com/).

```ts

import { Component } from 'react';
import { DraggableId } from 'react-beautiful-dnd-next';
import { DraggableLocation } from 'react-beautiful-dnd-next';
import { DraggableProvided } from 'react-beautiful-dnd-next';
import { DraggableProvidedDraggableProps } from 'react-beautiful-dnd-next';
import { DraggableProvidedDragHandleProps } from 'react-beautiful-dnd-next';
import { DraggableStateSnapshot } from 'react-beautiful-dnd-next';
import { DragStart } from 'react-beautiful-dnd-next';
import { DragUpdate } from 'react-beautiful-dnd-next';
import { DroppableId } from 'react-beautiful-dnd-next';
import { DroppableProvided } from 'react-beautiful-dnd-next';
import { DropResult } from 'react-beautiful-dnd-next';
import { ReactNode } from 'react';

// @public (undocumented)
type Combine = {
    draggableId: DraggableId;
    droppableId: DroppableId;
};

// @public (undocumented)
class DelayedFunction {
    constructor(delay: number);
    // (undocumented)
    delay: number;
    // (undocumented)
    fn?: Function;
    // (undocumented)
    start(fn: Function): void;
    // (undocumented)
    stop(): void;
    // (undocumented)
    timeoutId: number | undefined;
}

// @public (undocumented)
type DragState = {
    source: DraggableLocation;
    mode: string;
    destination?: DraggableLocation;
    horizontalLevel?: number;
    combine?: Combine;
};

// @public (undocumented)
type FlattenedItem = {
    item: TreeItem;
    path: Path;
};

// @public (undocumented)
type FlattenedTree = FlattenedItem[];

// @public (undocumented)
export type ItemId = number | string;

// @public (undocumented)
export const moveItemOnTree: (tree: TreeData, from: TreeSourcePosition, to: TreeDestinationPosition) => TreeData;

// @public (undocumented)
export const mutateTree: (tree: TreeData, itemId: ItemId, mutation: TreeItemMutation) => TreeData;

// @public (undocumented)
export type Path = number[];

// @public (undocumented)
type Props = {
    tree: TreeData;
    onExpand: (itemId: ItemId, path: Path) => void;
    onCollapse: (itemId: ItemId, path: Path) => void;
    onDragStart: (itemId: ItemId) => void;
    onDragEnd: (sourcePosition: TreeSourcePosition, destinationPosition?: TreeDestinationPosition) => void;
    renderItem: (item: RenderItemParams) => ReactNode;
    offsetPerLevel: number;
    isDragEnabled: ((item: TreeItem) => boolean) | boolean;
    isNestingEnabled: boolean;
};

// @public (undocumented)
export type RenderItemParams = {
    item: TreeItem;
    depth: number;
    onExpand: (itemId: ItemId) => void;
    onCollapse: (itemId: ItemId) => void;
    provided: TreeDraggableProvided;
    snapshot: DraggableStateSnapshot;
};

// @public (undocumented)
type State = {
    flattenedTree: FlattenedTree;
    draggedItemId?: ItemId;
};

// @public (undocumented)
class Tree extends Component<Props, State> {
    // (undocumented)
    calculateEffectivePath: (flatItem: FlattenedItem, snapshot: DraggableStateSnapshot) => Path;
    // (undocumented)
    static closeParentIfNeeded(tree: TreeData, draggedItemId?: ItemId): TreeData;
    // (undocumented)
    containerElement: HTMLElement | undefined;
    // (undocumented)
    static defaultProps: {
        tree: {
            children: never[];
        };
        onExpand: () => void;
        onCollapse: () => void;
        onDragStart: () => void;
        onDragEnd: () => void;
        renderItem: () => void;
        offsetPerLevel: number;
        isDragEnabled: boolean;
        isNestingEnabled: boolean;
    };
    // (undocumented)
    dragState?: DragState;
    // (undocumented)
    expandTimer: DelayedFunction;
    // (undocumented)
    static getDerivedStateFromProps(props: Props, state: State): {
        flattenedTree: FlattenedItem[];
        draggedItemId?: ItemId | undefined;
    };
    // (undocumented)
    getDroppedLevel: () => number | undefined;
    // (undocumented)
    isExpandable: (item: FlattenedItem) => boolean;
    // (undocumented)
    itemsElement: Record<ItemId, HTMLElement | undefined>;
    // (undocumented)
    onDragEnd: (result: DropResult) => void;
    // (undocumented)
    onDragStart: (result: DragStart) => void;
    // (undocumented)
    onDragUpdate: (update: DragUpdate) => void;
    // (undocumented)
    onDropAnimating: () => void;
    // (undocumented)
    onPointerMove: () => void;
    // (undocumented)
    patchDroppableProvided: (provided: DroppableProvided) => DroppableProvided;
    // (undocumented)
    render(): JSX.Element;
    // (undocumented)
    renderDraggableItem: (flatItem: FlattenedItem) => (provided: DraggableProvided, snapshot: DraggableStateSnapshot) => JSX.Element;
    // (undocumented)
    renderItem: (flatItem: FlattenedItem, index: number) => ReactNode;
    // (undocumented)
    renderItems: () => Array<ReactNode>;
    // (undocumented)
    renderTreeItem: ({ flatItem, path, provided, snapshot, }: {
        flatItem: FlattenedItem;
        path: Path;
        provided: DraggableProvided;
        snapshot: DraggableStateSnapshot;
    }) => JSX.Element;
    // (undocumented)
    setItemRef: (itemId: ItemId, el: HTMLElement | null) => void;
    // (undocumented)
    state: {
        flattenedTree: never[];
        draggedItemId: undefined;
    };
}
export default Tree;

// @public (undocumented)
export interface TreeData {
    // (undocumented)
    items: Record<ItemId, TreeItem>;
    // (undocumented)
    rootId: ItemId;
}

// @public (undocumented)
export type TreeDestinationPosition = {
    parentId: ItemId;
    index?: number;
};

// @public (undocumented)
type TreeDraggableProvided = {
    draggableProps: DraggableProvidedDraggableProps;
    dragHandleProps: DraggableProvidedDragHandleProps | null;
    innerRef: (el: HTMLElement | null) => void;
};

// @public (undocumented)
export type TreeItem = {
    id: ItemId;
    children: ItemId[];
    hasChildren?: boolean;
    isExpanded?: boolean;
    isChildrenLoading?: boolean;
    data?: TreeItemData;
};

// @public (undocumented)
type TreeItemData = any;

// @public (undocumented)
type TreeItemMutation = {
    id?: ItemId;
    children?: ItemId[];
    hasChildren?: boolean;
    isExpanded?: boolean;
    isChildrenLoading?: boolean;
    data?: TreeItemData;
};

// @public (undocumented)
export type TreeSourcePosition = {
    parentId: ItemId;
    index: number;
};

// (No @packageDocumentation comment for this package)

```