In a large-scale React project, different teams often work on separate feature branches that update the behavior of the same UI components (e.g., form validations, state transitions, conditional rendering).
This sometimes causes inconsistent behavior when branches are merged — for example:
A feature branch changes the useState default, but it's overwritten in another branch.
A condition inside a component is updated differently in two branches, leading to regressions.
Logic tied to feature flags behaves unexpectedly post-merge.
I'm looking for strategies to track and manage UI logic changes across branches to prevent such issues. Specifically:
How can we detect and manage conflicting logic in component state or behavior?
Are there best practices for isolating or documenting changes in UI state logic?
Are there tools or Git workflows that help with UI logic-level diffs, not just file-level diffs?
Any guidance from teams handling large UI codebases would be appreciated.
To manage this, I tried the following:
Using Git merge conflict resolution, but this only works at the line level, not at the logic level.
Writing detailed commit messages and PR documentation, but it still misses subtle UI logic changes.
Adding E2E tests to catch regressions, but this happens after merge, not during development.
Creating dedicated component logic files, hoping that diffing would be easier — but that’s not scalable for all components.
I expected to have a clear way to track and manage how component behavior (state, logic) changes across branches, ideally before merge conflicts or regressions appear.