react-flow-advanced

Sub-flows use parent-child node relationships with auto-expanding parent groups. React Flow's node system enables nesting by grouping child nodes within parent containers that automatically resize and reposition as content changes, creating hierarchical workflow structures.

Yes, custom edges support status-based styling through custom edge components. React Flow allows rendering connection lines with conditional styling applied via edge data properties, enabling visual indicators for different connection states.

External drag-and-drop integrates by converting screen coordinates to flow coordinates, then creating nodes programmatically. React Flow's coordinate conversion utilities and node-creation API handle placement of externally-dragged items onto the canvas.

Undo/redo maintains a history stack of graph state snapshots. Implement history management by capturing node and edge changes, storing them in a stack, and restoring previous states when undo or redo actions fire.

Programmatic layout uses dagre for hierarchical graph arrangement. Dagre calculates node positions based on graph structure, then React Flow applies those coordinates to achieve organized, collision-free layouts without manual positioning.

Advanced patterns build on React Flow fundamentals—familiarity with basic node and edge management helps, but the implementation covers sub-flows, custom rendering, and state management for complex use cases like workflow designers and diagram editors.