Foblex Flow
Undo/Redo
Description
This example demonstrates how to implement undo and redo functionality in a flow-based diagram. Undo and redo let users revert accidental changes, compare alternatives, and explore graph edits without fear of losing work.
If you are building a serious editor, history is not optional. It is one of the strongest signals that the interface is ready for repeated daily use instead of being only a demo.
Even a simple history model can dramatically improve trust in the editor and reduce user hesitation. That is why it is one of the first production features many teams add.
Example
[component.html] <<< https://raw.githubusercontent.com/Foblex/f-flow/main/projects/f-examples/advanced/undo-redo/undo-redo.component.html [component.ts] <<< https://raw.githubusercontent.com/Foblex/f-flow/main/projects/f-examples/advanced/undo-redo/undo-redo.component.ts [component.scss] <<< https://raw.githubusercontent.com/Foblex/f-flow/main/projects/f-examples/advanced/undo-redo/undo-redo.component.scss [common.scss] <<< https://raw.githubusercontent.com/Foblex/f-flow/main/projects/f-examples/_flow-common.scss
What this solves
- Revert node moves and connection changes.
- Make experimentation safe for end users.
- Provide a cleaner foundation for richer editor tooling later.
If your users edit flows repeatedly during the day, undo/redo quickly moves from “nice to have” to required product behavior.