ReactFlow Architect
Build production-ready ReactFlow applications with hierarchical navigation, performance optimization, and advanced state management.
Quick Start
Create basic interactive graph:
import ReactFlow, { Node, Edge } from "reactflow";
const nodes: Node[] = [
{ id: "1", position: { x: 0, y: 0 }, data: { label: "Node 1" } },
{ id: "2", position: { x: 100, y: 100 }, data: { label: "Node 2" } },
];
const edges: Edge[] = [{ id: "e1-2", source: "1", target: "2" }];
export default function Graph() {
return <ReactFlow nodes={nodes} edges={edges} />;
}Core Patterns
Hierarchical Tree Navigation
Build expandable/collapsible tree structures with parent-child relationships.
Node Schema
interface TreeNode extends Node {
data: {
label: string;
level: number;
hasChildren: boolean;
isExpanded: boolean;
childCount: number;
category: "root" | "category" | "process" | "detail";
};
}Incremental Node Building
const buildVisibleNodes = useCallback(
(allNodes: TreeNode[], expandedIds: Set<string>, otherDeps: any[]) => {
const visibleNodes = new Map<string, TreeNode>();
const visibleEdges = new Map<string, TreeEdge>();
// Start with root nodes
const rootNodes = allNodes.filter((n) => n.data.level === 0);
// Recursively add visible nodes
const addVisibleChildren = (node: TreeNode) => {
visibleNodes.set(node.id, node);
if (expandedIds.has(node.id)) {
const children = allNodes.filter((n) => n.parentNode === node.id);
children.forEach((child) => addVisibleChildren(child));
}
};
rootNodes.forEach((root) => addVisibleChildren(root));
return {
nodes: Array.from(visibleNodes.values()),
edges: Array.from(visibleEdges.values()),
};
},
[],
);Performance Optimization
Handle large datasets with incremental rendering and memoization.
Incremental Rendering
const useIncrementalGraph = (
allNodes: Node[],
allEdges: Edge[],
expandedList: string[],
) => {
const prevExpandedListRef = useRef<Set<string>>(new Set());
const prevOtherDepsRef = useRef<any[]>([]);
const { visibleNodes, visibleEdges } = useMemo(() => {
const currentExpandedSet = new Set(expandedList);
const prevExpandedSet = prevExpandedListRef.current;
// Check if expanded list changed
const expandedChanged = !areSetsEqual(currentExpandedSet, prevExpandedSet);
// Check if other dependencies changed
const otherDepsChanged = !arraysEqual(otherDeps, prevOtherDepsRef.current);
if (expandedChanged && !otherDepsChanged) {
// Only expanded list changed - incremental update
return buildIncrementalUpdate(
cachedVisibleNodesRef.current,
cachedVisibleEdgesRef.current,
allNodes,
allEdges,
currentExpandedSet,
prevExpandedSet,
);
} else {
// Full rebuild needed
return buildFullGraph(allNodes, allEdges, currentExpandedSet);
}
}, [allNodes, allEdges, expandedList, ...otherDeps]);
return { visibleNodes, visibleEdges };
};Memoization Patterns
// Memoize node components to prevent unnecessary re-renders
const ProcessNode = memo(({ data, selected }: NodeProps) => {
return (
<div className={`process-node ${selected ? 'selected' : ''}`}>
{data.label}
</div>
);
}, (prevProps, nextProps) => {
// Custom comparison function
return (
prevProps.data.label === nextProps.data.label &&
prevProps.selected === nextProps.selected &&
prevProps.data.isExpanded === nextProps.data.isExpanded
);
});
// Memoize edge calculations
const styledEdges = useMemo(() => {
return edges.map(edge => ({
...edge,
style: {
...edge.style,
strokeWidth: selectedEdgeId === edge.id ? 3 : 2,
stroke: selectedEdgeId === edge.id ? '#3b82f6' : '#94a3b8',
},
animated: selectedEdgeId === edge.id,
}));
}, [edges, selectedEdgeId]);State Management
Complex node/edge state patterns with undo/redo and persistence.
Reducer Pattern
type GraphAction =
| { type: "SELECT_NODE"; payload: string }
| { type: "SELECT_EDGE"; payload: string }
| { type: "TOGGLE_EXPAND"; payload: string }
| { type: "UPDATE_NODES"; payload: Node[] }
| { type: "UPDATE_EDGES"; payload: Edge[] }
| { type: "UNDO" }
| { type: "REDO" };
const graphReducer = (state: GraphState, action: GraphAction): GraphState => {
switch (action.type) {
case "SELECT_NODE":
return {
...state,
selectedNodeId: action.payload,
selectedEdgeId: null,
};
case "TOGGLE_EXPAND":
const newExpanded = new Set(state.expandedNodeIds);
if (newExpanded.has(action.payload)) {
newExpanded.delete(action.payload);
} else {
newExpanded.add(action.payload);
}
return {
...state,
expandedNodeIds: newExpanded,
isDirty: true,
};
default:
return state;
}
};History Management
const useHistoryManager = (
state: GraphState,
dispatch: Dispatch<GraphAction>,
) => {
const canUndo = state.historyIndex > 0;
const canRedo = state.historyIndex < state.history.length - 1;
const undo = useCallback(() => {
if (canUndo) {
const newIndex = state.historyIndex - 1;
const historyEntry = state.history[newIndex];
dispatch({
type: "RESTORE_FROM_HISTORY",
payload: {
...historyEntry,
historyIndex: newIndex,
},
});
}
}, [canUndo, state.historyIndex, state.history]);
const saveToHistory = useCallback(() => {
dispatch({ type: "SAVE_TO_HISTORY" });
}, [dispatch]);
return { canUndo, canRedo, undo, redo, saveToHistory };
};Advanced Features
Auto-Layout Integration
Integrate Dagre for automatic graph layout:
import dagre from "dagre";
const layoutOptions = {
rankdir: "TB", // Top to Bottom
nodesep: 100, // Node separation
ranksep: 150, // Rank separation
marginx: 50,
marginy: 50,
edgesep: 10,
};
const applyLayout = (nodes: Node[], edges: Edge[]) => {
const g = new dagre.graphlib.Graph();
g.setGraph(layoutOptions);
g.setDefaultEdgeLabel(() => ({}));
// Add nodes to graph
nodes.forEach((node) => {
g.setNode(node.id, { width: 200, height: 100 });
});
// Add edges to graph
edges.forEach((edge) => {
g.setEdge(edge.source, edge.target);
});
// Calculate layout
dagre.layout(g);
// Apply positions
return nodes.map((node) => ({
...node,
position: {
x: g.node(node.id).x - 100,
y: g.node(node.id).y - 50,
},
}));
};
// Debounce layout calculations
const debouncedLayout = useMemo(() => debounce(applyLayout, 150), []);Focus Mode
Isolate selected nodes and their direct connections:
const useFocusMode = (
selectedNodeId: string,
allNodes: Node[],
allEdges: Edge[],
) => {
return useMemo(() => {
if (!selectedNodeId) return { nodes: allNodes, edges: allEdges };
// Get direct connections
const connectedNodeIds = new Set([selectedNodeId]);
const focusedEdges: Edge[] = [];
allEdges.forEach((edge) => {
if (edge.source === selectedNodeId || edge.target === selectedNodeId) {
focusedEdges.push(edge);
connectedNodeIds.add(edge.source);
connectedNodeIds.add(edge.target);
}
});
// Get connected nodes
const focusedNodes = allNodes.filter((n) => connectedNodeIds.has(n.id));
return { nodes: focusedNodes, edges: focusedEdges };
}, [selectedNodeId, allNodes, allEdges]);
};
// Smooth transitions for focus mode
const focusModeStyles = {
transition: "all 0.3s ease-in-out",
opacity: isInFocus ? 1 : 0.3,
filter: isInFocus ? "none" : "blur(2px)",
};Search Integration
Search and navigate to specific nodes:
const searchNodes = useCallback((nodes: Node[], query: string) => {
if (!query.trim()) return [];
const lowerQuery = query.toLowerCase();
return nodes.filter(
(node) =>
node.data.label.toLowerCase().includes(lowerQuery) ||
node.data.description?.toLowerCase().includes(lowerQuery),
);
}, []);
const navigateToSearchResult = (nodeId: string) => {
// Expand parent nodes
const nodePath = calculateBreadcrumbPath(nodeId, allNodes);
const parentIds = nodePath.slice(0, -1).map((n) => n.id);
setExpandedIds((prev) => new Set([...prev, ...parentIds]));
setSelectedNodeId(nodeId);
// Fit view to node
fitView({ nodes: [{ id: nodeId }], duration: 800 });
};Performance Tools
Graph Performance Analyzer
Create a performance analysis script:
// scripts/graph-analyzer.js
class GraphAnalyzer {
analyzeCode(content, filePath) {
const analysis = {
metrics: {
nodeCount: this.countNodes(content),
edgeCount: this.countEdges(content),
renderTime: this.estimateRenderTime(content),
memoryUsage: this.estimateMemoryUsage(content),
complexity: this.calculateComplexity(content),
},
issues: [],
optimizations: [],
patterns: this.detectPatterns(content),
};
// Detect performance issues
this.detectPerformanceIssues(analysis);
// Suggest optimizations
this.suggestOptimizations(analysis);
return analysis;
}
countNodes(content) {
const nodePatterns = [
/nodes:\s*\[.*?\]/gs,
/const\s+\w+\s*=\s*\[.*?id:.*?position:/gs,
];
let totalCount = 0;
nodePatterns.forEach((pattern) => {
const matches = content.match(pattern);
if (matches) {
matches.forEach((match) => {
const nodeMatches = match.match(/id:\s*['"`][^'"`]+['"`]/g);
if (nodeMatches) {
totalCount += nodeMatches.length;
}
});
}
});
return totalCount;
}
estimateRenderTime(content) {
const nodeCount = this.countNodes(content);
const edgeCount = this.countEdges(content);
// Base render time estimation (ms)
const baseTime = 5;
const nodeTime = nodeCount * 0.1;
const edgeTime = edgeCount * 0.05;
return baseTime + nodeTime + edgeTime;
}
detectPerformanceIssues(analysis) {
const { metrics } = analysis;
if (metrics.nodeCount > 500) {
analysis.issues.push({
type: "HIGH_NODE_COUNT",
severity: "high",
message: `Too many nodes (${metrics.nodeCount}). Consider virtualization.`,
suggestion: "Implement virtualization or reduce visible nodes",
});
}
if (metrics.renderTime > 16) {
analysis.issues.push({
type: "SLOW_RENDER",
severity: "high",
message: `Render time (${metrics.renderTime.toFixed(2)}ms) exceeds 60fps.`,
suggestion: "Optimize with memoization and incremental rendering",
});
}
}
}Best Practices
Performance Guidelines
- Use React.memo for node components to prevent unnecessary re-renders
- Implement virtualization for graphs with 1000+ nodes
- Debounce layout calculations during rapid interactions
- Use useCallback for edge creation and manipulation functions
- Implement proper TypeScript types for nodes and edges
Memory Management
// Use Map for O(1) lookups instead of array.find
const nodesById = useMemo(
() => new Map(allNodes.map((n) => [n.id, n])),
[allNodes],
);
// Cache layout results
const layoutCacheRef = useRef<Map<string, Node[]>>(new Map());
// Proper cleanup in useEffect
useEffect(() => {
return () => {
// Clean up any lingering references
nodesMapRef.current.clear();
edgesMapRef.current.clear();
};
}, []);State Optimization
// Use useRef for objects that shouldn't trigger re-renders
const autoSaveDataRef = useRef({
nodes: [],
edges: [],
lastSaved: Date.now(),
});
// Update properties without breaking reference
const updateAutoSaveData = (newNodes: Node[], newEdges: Edge[]) => {
autoSaveDataRef.current.nodes = newNodes;
autoSaveDataRef.current.edges = newEdges;
autoSaveDataRef.current.lastSaved = Date.now();
};Common Problems & Solutions
Performance Issues
- Problem: Lag during node expansion
- Solution: Implement incremental rendering with change detection
- Problem: Memory usage increases over time
- Solution: Proper cleanup in useEffect hooks and use WeakMap for temporary data
Layout Conflicts
- Problem: Manual positioning conflicts with auto-layout
- Solution: Use controlled positioning state and separate layout modes
Rendering Issues
- Problem: Excessive re-renders
- Solution: Use memo, useMemo, and useCallback with stable dependencies
- Problem: Slow layout calculations
- Solution: Debounce layout calculations and cache results
Complete Example
import React, { useState, useCallback, useMemo, useRef } from 'react';
import ReactFlow, { Node, Edge, useReactFlow } from 'reactflow';
import dagre from 'dagre';
import { debounce } from 'lodash';
interface GraphState {
nodes: Node[];
edges: Edge[];
selectedNodeId: string | null;
expandedNodeIds: Set<string>;
history: GraphState[];
historyIndex: number;
}
export default function InteractiveGraph() {
const [state, setState] = useState<GraphState>({
nodes: [],
edges: [],
selectedNodeId: null,
expandedNodeIds: new Set(),
history: [],
historyIndex: 0,
});
const { fitView } = useReactFlow();
const layoutCacheRef = useRef<Map<string, Node[]>>(new Map());
// Memoized styled edges
const styledEdges = useMemo(() => {
return state.edges.map(edge => ({
...edge,
style: {
...edge.style,
strokeWidth: state.selectedNodeId === edge.source || state.selectedNodeId === edge.target ? 3 : 2,
stroke: state.selectedNodeId === edge.source || state.selectedNodeId === edge.target ? '#3b82f6' : '#94a3b8',
},
animated: state.selectedNodeId === edge.source || state.selectedNodeId === edge.target,
}));
}, [state.edges, state.selectedNodeId]);
// Debounced layout calculation
const debouncedLayout = useMemo(
() => debounce((nodes: Node[], edges: Edge[]) => {
const cacheKey = generateLayoutCacheKey(nodes, edges);
if (layoutCacheRef.current.has(cacheKey)) {
return layoutCacheRef.current.get(cacheKey)!;
}
const layouted = applyDagreLayout(nodes, edges);
layoutCacheRef.current.set(cacheKey, layouted);
return layouted;
}, 150),
[]
);
const handleNodeClick = useCallback((event: React.MouseEvent, node: Node) => {
setState(prev => ({
...prev,
selectedNodeId: node.id,
}));
}, []);
const handleToggleExpand = useCallback((nodeId: string) => {
setState(prev => {
const newExpanded = new Set(prev.expandedNodeIds);
if (newExpanded.has(nodeId)) {
newExpanded.delete(nodeId);
} else {
newExpanded.add(nodeId);
}
return {
...prev,
expandedNodeIds: newExpanded,
};
});
}, []);
return (
<ReactFlow
nodes={state.nodes}
edges={styledEdges}
onNodeClick={handleNodeClick}
fitView
/>
);
}This comprehensive skill provides everything needed to build production-ready ReactFlow applications with hierarchical navigation, performance optimization, and advanced state management patterns.
When to Use
This skill is applicable to execute the workflow or actions described in the overview.
Limitations
- Use this skill only when the task clearly matches the scope described above.
- Do not treat the output as a substitute for environment-specific validation, testing, or expert review.
- Stop and ask for clarification if required inputs, permissions, safety boundaries, or success criteria are missing.