Graph Undo/Redo History
This example shows a compact editable relation-graph canvas with snapshot-based undo, redo, and direct history jumping. It captures graph state after supported edits, exposes both keyboard shortcuts and floating history controls, and restores older versions by rebuilding nodes and lines from serialized graph JSON.
Undo, Redo, and Snapshot History in a Compact Graph Editor
What This Example Builds
This example builds a small editable graph canvas with document-style history controls. Users see a fixed-position relation graph, a floating toolbar for undo, redo, and history visibility, and a floating history panel that lists saved snapshots in reverse chronological order.
The graph itself stays visually simple: rectangular nodes, standard links, and full-viewport canvas space. The important behavior