Merge pull request #5308 from xyflow/5030-focus-nodes-when-user-selects-via-tab

feat(NodeWrapper): focus nodes in the viewport on tab

.changeset/thirty-snakes-float.md

@@ -0,0 +1,6 @@
+---
+"@xyflow/react": minor
+"@xyflow/svelte": minor
+---
+
+Focus nodes on tab if not within the viewport and add a new prop `autoPanOnNodeFocus`

examples/react/src/examples/A11y/index.tsx

@@ -1,4 +1,4 @@
-import { MouseEvent } from 'react';
+import { MouseEvent, useState } from 'react';
 import {
   ReactFlow,
   MiniMap,
@@ -8,40 +8,53 @@ import {
   ReactFlowProvider,
   Node,
   Edge,
-  OnNodeDrag,
   AriaLabelConfig,
+  Panel,
 } from '@xyflow/react';
 
-const onNodeDrag: OnNodeDrag = (_, node: Node, nodes: Node[]) => console.log('drag', node, nodes);
-const onNodeDragStart = (_: MouseEvent, node: Node, nodes: Node[]) => console.log('drag start', node, nodes);
-const onNodeDragStop = (_: MouseEvent, node: Node, nodes: Node[]) => console.log('drag stop', node, nodes);
-const onNodeClick = (_: MouseEvent, node: Node) => console.log('click', node);
-
 const initialNodes: Node[] = [
   {
     id: '1',
     type: 'input',
     data: { label: 'A11y Node 1' },
     position: { x: 250, y: 5 },
-    className: 'light',
   },
   {
     id: '2',
     data: { label: 'Node 2' },
-    position: { x: 100, y: 100 },
-    className: 'light',
+    position: { x: 1000, y: 100 },
   },
   {
     id: '3',
     data: { label: 'Node 3' },
-    position: { x: 400, y: 100 },
+    position: { x: 100, y: 100 },
     className: 'light',
+    ariaRoleDescription: 'custom node role',
+    ariaRole: 'button',
+  },
+  {
+    id: '4',
+    data: { label: 'Node 4' },
+    position: { x: 300, y: 100 },
+  },
+  {
+    id: '5',
+    data: { label: 'Node 5' },
+    position: { x: 400, y: 200 },
+  },
+  {
+    id: '6',
+    data: { label: 'Node 6' },
+    position: { x: -1000, y: 200 },
   },
 ];
 
 const initialEdges: Edge[] = [
   { id: 'e1-2', source: '1', target: '2', animated: true },
   { id: 'e1-3', source: '1', target: '3' },
+  { id: 'e1-4', source: '1', target: '4' },
+  { id: 'e1-5', source: '4', target: '5' },
+  { id: 'e1-6', source: '3', target: '6' },
 ];
 
 const ariaLabelConfig: Partial<AriaLabelConfig> = {
@@ -59,19 +72,13 @@ const ariaLabelConfig: Partial<AriaLabelConfig> = {
 };
 
 const A11y = () => {
+  const [autoPanOnNodeFocus, setAutoPanOnNodeFocus] = useState(true);
+
   return (
     <ReactFlow
       defaultNodes={initialNodes}
       defaultEdges={initialEdges}
-      onNodesChange={console.log}
-      onNodeClick={onNodeClick}
-      onNodeDragStop={onNodeDragStop}
-      onNodeDragStart={onNodeDragStart}
-      onNodeDrag={onNodeDrag}
-      className="react-flow-basic-example"
-      minZoom={0.2}
-      maxZoom={4}
-      fitView
+      autoPanOnNodeFocus={autoPanOnNodeFocus}
       selectNodesOnDrag={false}
       elevateEdgesOnSelect
       elevateNodesOnSelect={false}
@@ -81,6 +88,20 @@ const A11y = () => {
       <Background variant={BackgroundVariant.Dots} />
       <MiniMap />
       <Controls />
+      <Panel position="top-right">
+        <div>
+          <label htmlFor="focusPannable">
+            <input
+              id="focusPannable"
+              type="checkbox"
+              checked={autoPanOnNodeFocus}
+              onChange={(event) => setAutoPanOnNodeFocus(event.target.checked)}
+              className="xy-theme__checkbox"
+            />
+            autoPanOnNodeFocus
+          </label>
+        </div>
+      </Panel>
     </ReactFlow>
   );
 };

examples/svelte/src/routes/examples/a11y/+page.svelte

@@ -1,5 +1,5 @@
 <script lang="ts">
-	import { SvelteFlow, Controls, Background, MiniMap } from '@xyflow/svelte';
+	import { SvelteFlow, Controls, Background, MiniMap, Panel } from '@xyflow/svelte';
 
 	import '@xyflow/svelte/dist/style.css';
 
@@ -10,7 +10,7 @@
 			data: { label: 'A' }
 		},
 		{ id: 'B', position: { x: -100, y: 150 }, data: { label: 'B' } },
-		{ id: 'C', position: { x: 100, y: 150 }, data: { label: 'C' } },
+		{ id: 'C', position: { x: 1000, y: 150 }, data: { label: 'C' } },
 		{ id: 'D', position: { x: 0, y: 260 }, data: { label: 'D' } }
 	]);
 
@@ -19,17 +19,19 @@
 		{ id: 'A-C', source: 'A', target: 'C' },
 		{ id: 'A-D', source: 'A', target: 'D' }
 	]);
-</script>
-
-<SvelteFlow
-	bind:nodes
-	bind:edges
-	fitView
-	ariaLabelConfig={{
+	let autoPanOnNodeFocus = $state(true);
+	const ariaLabelConfig = $state({
 		'node.a11yDescription.default': 'Svelte Custom Node Desc.',
 		'node.a11yDescription.keyboardDisabled': 'Svelte Custom Keyboard Desc.',
-		'node.a11yDescription.ariaLiveMessage': ({ direction, x, y }) =>
-			`Custom Moved selected node ${direction}. New position, x: ${x}, y: ${y}`,
+		'node.a11yDescription.ariaLiveMessage': ({
+			direction,
+			x,
+			y
+		}: {
+			direction: string;
+			x: number;
+			y: number;
+		}) => `Custom Moved selected node ${direction}. New position, x: ${x}, y: ${y}`,
 		'edge.a11yDescription.default': 'Svelte Custom Edge Desc.',
 		'controls.ariaLabel': 'Svelte Custom Control Aria Label',
 		'controls.zoomIn.ariaLabel': 'Svelte Custom Zoom in',
@@ -37,9 +39,24 @@
 		// 'controls.fitView.ariaLabel': 'Svelte Custom Fit View',
 		'controls.interactive.ariaLabel': 'Svelte Custom Toggle Interactivity',
 		'minimap.ariaLabel': 'Svelte Custom Minimap'
-	}}
->
+	});
+</script>
+
+<SvelteFlow bind:nodes bind:edges {autoPanOnNodeFocus} {ariaLabelConfig}>
 	<Controls />
 	<Background />
 	<MiniMap />
+	<Panel class="panel top-right">
+		<div>
+			<label for="focusPannable">
+				Enable Pan on Focus
+				<input
+					id="focusPannable"
+					type="checkbox"
+					bind:checked={autoPanOnNodeFocus}
+					class="svelte-flow__zoomonscroll"
+				/>
+			</label>
+		</div>
+	</Panel>
 </SvelteFlow>

packages/react/src/components/NodeWrapper/index.tsx

@@ -7,6 +7,7 @@ import {
   getNodeDimensions,
   isInputDOMNode,
   nodeHasDimensions,
+  getNodesInside,
 } from '@xyflow/system';
 
 import { useStore, useStoreApi } from '../../hooks/useStore';
@@ -158,6 +159,28 @@ export function NodeWrapper<NodeType extends Node>({
       });
     }
   };
+
+  const onFocus = () => {
+    if (disableKeyboardA11y || !nodeRef.current?.matches(':focus-visible')) {
+      return;
+    }
+
+    const { transform, width, height, autoPanOnNodeFocus, setCenter } = store.getState();
+
+    if (!autoPanOnNodeFocus) {
+      return;
+    }
+
+    const withinViewport =
+      getNodesInside(new Map([[id, node]]), { x: 0, y: 0, width, height }, transform, true).length > 0;
+
+    if (!withinViewport) {
+      setCenter(node.position.x + nodeDimensions.width / 2, node.position.y + nodeDimensions.height / 2, {
+        zoom: transform[2],
+      });
+    }
+  };
+
   return (
     <div
       className={cc([
@@ -195,6 +218,7 @@ export function NodeWrapper<NodeType extends Node>({
       onDoubleClick={onDoubleClickHandler}
       onKeyDown={isFocusable ? onKeyDown : undefined}
       tabIndex={isFocusable ? 0 : undefined}
+      onFocus={isFocusable ? onFocus : undefined}
       role={node.ariaRole ?? (isFocusable ? 'group' : undefined)}
       aria-roledescription={node.ariaRoleDescription || 'node'}
       aria-describedby={disableKeyboardA11y ? undefined : `${ARIA_NODE_DESC_KEY}-${rfId}`}

packages/react/src/components/StoreUpdater/index.tsx

@@ -23,6 +23,7 @@ const reactFlowFieldsToTrack = [
   'onClickConnectStart',
   'onClickConnectEnd',
   'nodesDraggable',
+  'autoPanOnNodeFocus',
   'nodesConnectable',
   'nodesFocusable',
   'edgesFocusable',

packages/react/src/container/NodeRenderer/index.tsx

@@ -48,13 +48,13 @@ function NodeRendererComponent<NodeType extends Node>(props: NodeRendererProps<N
            * The split of responsibilities between NodeRenderer and
            * NodeComponentWrapper may appear weird. However, it’s designed to
            * minimize the cost of updates when individual nodes change.
-           * 
+           *
            * For example, when you’re dragging a single node, that node gets
            * updated multiple times per second. If `NodeRenderer` were to update
            * every time, it would have to re-run the `nodes.map()` loop every
            * time. This gets pricey with hundreds of nodes, especially if every
            * loop cycle does more than just rendering a JSX element!
-           * 
+           *
            * As a result of this choice, we took the following implementation
            * decisions:
            * - NodeRenderer subscribes *only* to node IDs – and therefore

packages/react/src/container/ReactFlow/index.tsx

@@ -77,6 +77,7 @@ function ReactFlow<NodeType extends Node = Node, EdgeType extends Edge = Edge>(
     onlyRenderVisibleElements = false,
     selectNodesOnDrag,
     nodesDraggable,
+    autoPanOnNodeFocus,
     nodesConnectable,
     nodesFocusable,
     nodeOrigin = defaultNodeOrigin,
@@ -261,6 +262,7 @@ function ReactFlow<NodeType extends Node = Node, EdgeType extends Edge = Edge>(
           onClickConnectStart={onClickConnectStart}
           onClickConnectEnd={onClickConnectEnd}
           nodesDraggable={nodesDraggable}
+          autoPanOnNodeFocus={autoPanOnNodeFocus}
           nodesConnectable={nodesConnectable}
           nodesFocusable={nodesFocusable}
           edgesFocusable={edgesFocusable}

packages/react/src/hooks/useViewportHelper.ts

@@ -63,25 +63,7 @@ const useViewportHelper = (): ViewportHelperFunctions => {
         return { x, y, zoom };
       },
       setCenter: async (x, y, options) => {
-        const { width, height, maxZoom, panZoom } = store.getState();
-        const nextZoom = typeof options?.zoom !== 'undefined' ? options.zoom : maxZoom;
-        const centerX = width / 2 - x * nextZoom;
-        const centerY = height / 2 - y * nextZoom;
-
-        if (!panZoom) {
-          return Promise.resolve(false);
-        }
-
-        await panZoom.setViewport(
-          {
-            x: centerX,
-            y: centerY,
-            zoom: nextZoom,
-          },
-          { duration: options?.duration, ease: options?.ease, interpolate: options?.interpolate }
-        );
-
-        return Promise.resolve(true);
+        return store.getState().setCenter(x, y, options);
       },
       fitBounds: async (bounds, options) => {
         const { width, height, minZoom, maxZoom, panZoom } = store.getState();

packages/react/src/store/index.ts

@@ -360,6 +360,26 @@ const createStore = ({
 
         return panBySystem({ delta, panZoom, transform, translateExtent, width, height });
       },
+      setCenter: async (x, y, options) => {
+        const { width, height, maxZoom, panZoom } = get();
+
+        if (!panZoom) {
+          return Promise.resolve(false);
+        }
+
+        const nextZoom = typeof options?.zoom !== 'undefined' ? options.zoom : maxZoom;
+
+        await panZoom.setViewport(
+          {
+            x: width / 2 - x * nextZoom,
+            y: height / 2 - y * nextZoom,
+            zoom: nextZoom,
+          },
+          { duration: options?.duration, ease: options?.ease, interpolate: options?.interpolate }
+        );
+
+        return Promise.resolve(true);
+      },
       cancelConnection: () => {
         set({
           connection: { ...initialConnection },

packages/react/src/store/initialState.ts

@@ -134,7 +134,9 @@ const getInitialState = ({
     ariaLiveMessage: '',
     autoPanOnConnect: true,
     autoPanOnNodeDrag: true,
+    autoPanOnNodeFocus: true,
     autoPanSpeed: 15,
+
     connectionRadius: 20,
     onError: devWarn,
     isValidConnection: undefined,

packages/react/src/types/component-props.ts

@@ -383,6 +383,11 @@ export interface ReactFlowProps<NodeType extends Node = Node, EdgeType extends E
    * @default true
    */
   nodesDraggable?: boolean;
+  /**
+   * When `true`, the viewport will pan when a node is focused.
+   * @default true
+   */
+  autoPanOnNodeFocus?: boolean;
   /**
    * Controls whether all nodes should be connectable or not. Individual nodes can override this
    * setting by setting their `connectable` prop.

packages/react/src/types/store.ts

@@ -29,6 +29,7 @@ import {
   type EdgeChange,
   type ParentLookup,
   type AriaLabelConfig,
+  SetCenter,
 } from '@xyflow/system';
 
 import type {
@@ -88,6 +89,7 @@ export type ReactFlowStore<NodeType extends Node = Node, EdgeType extends Edge =
   snapGrid: SnapGrid;
 
   nodesDraggable: boolean;
+  autoPanOnNodeFocus: boolean;
   nodesConnectable: boolean;
   nodesFocusable: boolean;
   edgesFocusable: boolean;
@@ -171,6 +173,7 @@ export type ReactFlowActions<NodeType extends Node, EdgeType extends Edge> = {
   triggerNodeChanges: (changes: NodeChange<NodeType>[]) => void;
   triggerEdgeChanges: (changes: EdgeChange<EdgeType>[]) => void;
   panBy: PanBy;
+  setCenter: SetCenter;
   setPaneClickDistance: (distance: number) => void;
 };
 

packages/svelte/src/lib/components/NodeWrapper/NodeWrapper.svelte

@@ -5,7 +5,8 @@
     errorMessages,
     isInputDOMNode,
     nodeHasDimensions,
-    Position
+    Position,
+    getNodesInside
   } from '@xyflow/system';
 
   import drag from '$lib/actions/drag';
@@ -197,6 +198,34 @@
       store.moveSelectedNodes(arrowKeyDiffs[event.key], event.shiftKey ? 4 : 1);
     }
   }
+
+  const onFocus = () => {
+    if (
+      store.disableKeyboardA11y ||
+      !store.autoPanOnNodeFocus ||
+      !nodeRef?.matches(':focus-visible')
+    ) {
+      return;
+    }
+
+    const { width, height, viewport } = store;
+
+    const withinViewport =
+      getNodesInside(
+        new Map([[id, node]]),
+        { x: 0, y: 0, width, height },
+        [viewport.x, viewport.y, viewport.zoom],
+        true
+      ).length > 0;
+
+    if (!withinViewport) {
+      store.setCenter(
+        node.position.x + (node.measured.width ?? 0) / 2,
+        node.position.y + (node.measured.height ?? 0) / 2,
+        { zoom: viewport.zoom }
+      );
+    }
+  };
 </script>
 
 {#if !hidden}
@@ -252,6 +281,7 @@
       ? (event) => onnodecontextmenu({ node: userNode, event })
       : undefined}
     onkeydown={focusable ? onKeyDown : undefined}
+    onfocus={focusable ? onFocus : undefined}
     tabIndex={focusable ? 0 : undefined}
     role={node.ariaRole ?? (focusable ? 'group' : undefined)}
     aria-roledescription={node.ariaRoleDescription || 'node'}

packages/svelte/src/lib/container/SvelteFlow/Wrapper.svelte

@@ -84,6 +84,7 @@
     elevateNodesOnSelect,
     elevateEdgesOnSelect,
     nodesDraggable,
+    autoPanOnNodeFocus,
     nodesConnectable,
     elementsSelectable,
     nodesFocusable,
@@ -100,6 +101,16 @@
   type OnlyDivAttributes<T> = {
     [K in keyof T]: K extends keyof HTMLAttributes<HTMLDivElement> ? T[K] : never;
   };
+
+  // Undo scroll events, preventing viewport from shifting when nodes outside of it are focused
+  function wrapperOnScroll(e: UIEvent & { currentTarget: EventTarget & HTMLDivElement }) {
+    e.currentTarget.scrollTo({ top: 0, left: 0, behavior: 'auto' });
+
+    // Forward the event to any existing onscroll handler if needed
+    if (rest.onscroll) {
+      rest.onscroll(e);
+    }
+  }
 </script>
 
 <div
@@ -111,6 +122,7 @@
   class={['svelte-flow', 'svelte-flow__container', className, colorMode]}
   data-testid="svelte-flow__wrapper"
   role="application"
+  onscroll={wrapperOnScroll}
   {...divAttributes satisfies OnlyDivAttributes<typeof divAttributes>}
 >
   {@render children?.()}

packages/svelte/src/lib/container/SvelteFlow/types.ts

@@ -232,6 +232,11 @@ export type SvelteFlowProps<
      * @default true
      */
     nodesDraggable?: boolean;
+    /**
+     * When `true`, the viewport will pan when a node is focused.
+     * @default true
+     */
+    autoPanOnNodeFocus?: boolean;
     /**
      * Controls if all nodes should be connectable to each other
      * @default true

packages/svelte/src/lib/hooks/useSvelteFlow.svelte.ts

@@ -366,28 +366,8 @@ export function useSvelteFlow<NodeType extends Node = Node, EdgeType extends Edg
       return Promise.resolve(true);
     },
     getViewport: () => $state.snapshot(store.viewport),
-    setCenter: async (x, y, options) => {
-      const nextZoom = typeof options?.zoom !== 'undefined' ? options.zoom : store.maxZoom;
-      const currentPanZoom = store.panZoom;
-
-      if (!currentPanZoom) {
-        return Promise.resolve(false);
-      }
-
-      await currentPanZoom.setViewport(
-        {
-          x: store.width / 2 - x * nextZoom,
-          y: store.height / 2 - y * nextZoom,
-          zoom: nextZoom
-        },
-        { duration: options?.duration, ease: options?.ease, interpolate: options?.interpolate }
-      );
-
-      return Promise.resolve(true);
-    },
-    fitView: (options?: FitViewOptions) => {
-      return store.fitView(options);
-    },
+    setCenter: async (x, y, options) => store.setCenter(x, y, options),
+    fitView: (options?: FitViewOptions) => store.fitView(options),
     fitBounds: async (bounds: Rect, options?: FitBoundsOptions) => {
       if (!store.panZoom) {
         return Promise.resolve(false);

packages/svelte/src/lib/store/index.ts

@@ -14,7 +14,8 @@ import {
   type ConnectionState,
   updateAbsolutePositions,
   snapPosition,
-  calculateNodePosition
+  calculateNodePosition,
+  type SetCenterOptions
 } from '@xyflow/system';
 
 import type { EdgeTypes, NodeTypes, Node, Edge, FitViewOptions } from '$lib/types';
@@ -126,6 +127,26 @@ export function createStore<NodeType extends Node = Node, EdgeType extends Edge
     return fitViewResolver.promise;
   }
 
+  async function setCenter(x: number, y: number, options?: SetCenterOptions) {
+    const nextZoom = typeof options?.zoom !== 'undefined' ? options.zoom : store.maxZoom;
+    const currentPanZoom = store.panZoom;
+
+    if (!currentPanZoom) {
+      return Promise.resolve(false);
+    }
+
+    await currentPanZoom.setViewport(
+      {
+        x: store.width / 2 - x * nextZoom,
+        y: store.height / 2 - y * nextZoom,
+        zoom: nextZoom
+      },
+      { duration: options?.duration, ease: options?.ease, interpolate: options?.interpolate }
+    );
+
+    return Promise.resolve(true);
+  }
+
   function zoomBy(factor: number, options?: ViewportHelperFunctionOptions) {
     const panZoom = store.panZoom;
     if (!panZoom) {
@@ -372,6 +393,7 @@ export function createStore<NodeType extends Node = Node, EdgeType extends Edge
     zoomIn,
     zoomOut,
     fitView,
+    setCenter,
     setMinZoom,
     setMaxZoom,
     setTranslateExtent,

packages/svelte/src/lib/store/initial-store.svelte.ts

@@ -266,6 +266,7 @@ export function getInitialStore<NodeType extends Node = Node, EdgeType extends E
     nodeDragThreshold: number = $derived(signals.props.nodeDragThreshold ?? 1);
     autoPanOnNodeDrag: boolean = $derived(signals.props.autoPanOnNodeDrag ?? true);
     autoPanOnConnect: boolean = $derived(signals.props.autoPanOnConnect ?? true);
+    autoPanOnNodeFocus: boolean = $derived(signals.props.autoPanOnNodeFocus ?? true);
 
     fitViewQueued: boolean = signals.props.fitView ?? false;
     fitViewOptions: FitViewOptions | undefined = signals.props.fitViewOptions;

packages/svelte/src/lib/store/types.ts

@@ -6,7 +6,8 @@ import type {
   UpdateNodePositions,
   CoordinateExtent,
   UpdateConnection,
-  Viewport
+  Viewport,
+  SetCenter
 } from '@xyflow/system';
 
 import type { getInitialStore } from './initial-store.svelte';
@@ -24,6 +25,7 @@ export type SvelteFlowStoreActions<NodeType extends Node = Node, EdgeType extend
   setTranslateExtent: (extent: CoordinateExtent) => void;
   setPaneClickDistance: (distance: number) => void;
   fitView: (options?: FitViewOptions) => Promise<boolean>;
+  setCenter: SetCenter;
   updateNodePositions: UpdateNodePositions;
   updateNodeInternals: (updates: Map<string, InternalNodeUpdate>) => void;
   unselectNodesAndEdges: (params?: { nodes?: NodeType[]; edges?: EdgeType[] }) => void;

tooling/eslint-config/src/index.js

@@ -36,7 +36,6 @@ module.exports = {
         projectService: true,
       },
       rules: {
-        '@typescript-eslint/no-deprecated': 'error',
         '@typescript-eslint/no-unnecessary-type-assertion': 'error',
       },
     },