Reference
ReactFlowInstance

ReactFlowInstance

Source on GitHub (opens in a new tab)

The ReactFlowInstance provides a collection of methods to query and manipulate the internal state of your flow. You can get an instance by using the useReactFlow hook or attaching a listener to the onInit event.

export type ReactFlowInstance<T, U> = {
  // Nodes and Edges
  getNode: (id: string) => Node<T> | undefined;
  getNodes: () => Node<T>[];
  addNodes: (payload: Node<T>[] | Node<T>) => void;
  setNodes: (payload: Node<T>[] | ((nodes: Node<T>[]) => Node<T>[])) => void;
 
  getEdge: (id: string) => Edge<U> | undefined;
  getEdges: () => Edge<U>[];
  addEdges: (payload: Edge<U>[] | Edge<U>) => void;
  setEdges: (payload: Edge<U>[] | ((edges: Edge<U>[]) => Edge<U>[])) => void;
 
  toObject: () => ReactFlowJsonObject<T, U>;
  deleteElements: (payload: {
    nodes?: (Partial<Node> & { id: Node['id'] })[];
    edges?: (Partial<Edge> & { id: Edge['id'] })[];
  }) => void;
  getNodesBounds: (nodes: (NodeType | InternalNode | string)[]) => Rect;
 
  // Intersections
  getIntersectingNodes: (
    node: (Partial<Node<T>> & { id: Node['id'] }) | Rect,
    partially?: boolean,
    nodes?: Node<T>[],
  ) => Node<T>[];
 
  isNodeIntersecting: (
    node: (Partial<Node<T>> & { id: Node['id'] }) | Rect,
    area: Rect,
    partially?: boolean,
  ) => boolean;
 
  // Viewport
  viewportInitialized: boolean;
  zoomIn: (options?: { duration: number }) => void;
  zoomOut: (options?: { duration: number }) => void;
  zoomTo: (zoomLevel: number, options?: { duration: number }) => void;
  getZoom: () => number;
  setViewport: (viewport: Viewport, options?: { duration: number }) => void;
  getViewport: () => Viewport;
  fitView: (fitViewOptions?: FitViewOptions) => boolean;
  setCenter: (
    x: number,
    y: number,
    options?: { duration: number; zoom: number },
  ) => void;
  fitBounds: (
    bounds: Rect,
    options?: { duration: number; padding: number },
  ) => void;
  screenToFlowPosition: (position: { x: number; y: number }) => {
    x: number;
    y: number;
  };
  flowToScreenPosition: (position: { x: number; y: number }) => {
    x: number;
    y: number;
  };
  updateNode: (
    id: string,
    nodeUpdate: Partial<NodeType> | ((node: NodeType) => Partial<NodeType>),
    options?: { replace: boolean },
  ) => void;
  updateNodeData: (
    id: string,
    dataUpdate:
      | Partial<NodeType>['data']
      | ((node: Node) => Partial<NodeType>['data']),
    options?: { replace: boolean },
  ) => void;
  updateEdge: (
    id: string,
    edgeUpdate: Partial<EdgeType> | ((node: EdgeType) => Partial<EdgeType>),
    options?: { replace: boolean },
  ) => void;
  updateEdgeData: (
    id: string,
    dataUpdate:
      | Partial<EdgeType>['data']
      | ((node: Edge) => Partial<EdgeType>['data']),
    options?: { replace: boolean },
  ) => void;
};

Fields

Nodes and edges

#getNode
(id: string) => Node<T> | undefined
#getInternalNode
(id: string) => InternalNode<T> | undefined
#getNodes
() => Node<T>[]
#addNodes
(payload: Node<T>[] | Node<T>) => void
Add one or many nodes to your existing nodes array. Calling this function will trigger the onNodesChange handler in a controlled flow.
#setNodes
(payload: Node<T>[] | ((nodes: Node<T>[]) => Node<T>[])) => void
Set your nodes array to something else by either overwriting it with a new array or by passing in a function to update the existing array. If using a function, it is important to make sure a new array is returned instead of mutating the existing array. Calling this function will trigger the onNodesChange handler in a controlled flow.
#getEdge
(id: string) => Edge<U> | undefined
#getEdges
() => Edge<U>[]
#addEdges
(payload: Edge<U>[] | Edge<U>) => void
Add one or many edges to your existing edges array. Calling this function will trigger the onEdgesChange handler in a controlled flow.
#setEdges
(payload: Edge<U>[] | ((edges: Edge<U>[]) => Edge<U>[])) => void
Set your edges array to something else by either overwriting it with a new array or by passing in a function to update the existing array. If using a function, it is important to make sure a new array is returned instead of mutating the existing array. Calling this function will trigger the onEdgesChange handler in a controlled flow.
#toObject
This function returns a JSON representation of your current React Flow graph.
#deleteElements
#updateNode
(id: string, nodeUpdate: Partial<NodeType> | ((node: NodeType) => Partial<NodeType>), options?: { replace: boolean }) => void
#updateNodeData
(id: string, dataUpdate: Partial<NodeType['data']> | ((edge: NodeType) => Partial<NodeType['data']>), options?: { replace: boolean }) => void
#updateEdge
(id: string, edgeUpdate: Partial<EdgeType> | ((node: EdgeType) => Partial<EdgeType>), options?: { replace: boolean }) => void
#updateEdgeData
(id: string, dataUpdate: Partial<EdgeType['data']> | ((edge: EdgeType) => Partial<EdgeType['data']>), options?: { replace: boolean }) => void
#getHandleConnections
({ type, nodeId, id }: { type: HandleType, nodeId: string, id?: string | null }) => HandleConnection[]
Get all the connections of a handle belonging to a specific node. The type parameter be either 'source' or 'target'.
#getNodesBounds
(nodes: (NodeType | InternalNode | string)[]) => Rect
Returns the bounds of the given nodes or node ids.

Intersections

#getIntersectingNodes
(node: (Partial<Node<T>> & { id: Node["id"] }) | Rect, partially?: boolean, nodes?: Node<T>[]) => Node<T>[]
Find all the nodes currently intersecting with a given node or rectangle. The partially parameter can be set to true to include nodes that are only partially intersecting.
#isNodeIntersecting
(node: (Partial<Node<T>> & { id: Node["id"] }) | Rect, area: Rect, partially?: boolean) => boolean
Determine if a given node or rectangle is intersecting with another rectangle. The partially parameter can be set to true return true even if the node is only partially intersecting.

Viewport fields

#viewportInitialized
boolean
React Flow needs to mount the viewport to the DOM and initialize its zoom and pan behaviour. This property tells you when
#zoomIn
(options?: { duration: number; }) => void
#zoomOut
(options?: { duration: number; }) => void
#zoomTo
(zoomLevel: number, options?: { duration: number; }) => void
Zoom the viewport to a given zoom level. Passing in a duration will animate the viewport to the new zoom level.
#getZoom
() => number
Get the current zoom level of the viewport.
#setViewport
(viewport: Viewport, options?: { duration: number; }) => void
#getViewport
() => Viewport
#fitView
(fitViewOptions?: FitViewOptions) => boolean
#setCenter
(x: number, y: number, options?: { duration: number, zoom: number; }) => void
Center the viewport on a given position. Passing in a duration will animate the viewport to the new position.
#fitBounds
(bounds: Rect, options?: { duration: number, padding: number; }) => void
A low-level utility function to fit the viewport to a given rectangle. By pasing in a duration, the viewport will animate from its current position to the new position. The padding option can be used to add space around the bounds.
#screenToFlowPosition
(position: { x: number; y: number; }) => { x: number; y: number; }
With this function you can translate a screen pixel position to a flow position. It is useful for implemting drag and drop from a sidebar for example.
#flowToScreenPosition
(position: { x: number; y: number; }) => { x: number; y: number; }
Translate a position inside the flow's canvas to a screen pixel position.