Elegant UI Undo Stack Algorithm: Avoiding Indexing Errors
2025-03-26
This article presents a clever implementation of a UI undo stack algorithm. Instead of the traditional index-based approach, it uses two stacks (undoStack and redoStack) to manage undo and redo operations, neatly avoiding common indexing errors and off-by-one issues. The code is concise and easy to understand. The author addresses the pass-by-reference problem in JavaScript using `structuredClone()`, ensuring idempotency. A complete code example is provided.