Defensive coding to reduce the risk of Maximum update depth errors#20940
Defensive coding to reduce the risk of Maximum update depth errors#20940
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Summary of ChangesHello, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed! This pull request introduces defensive coding practices to resolve and prevent 'Maximum update depth exceeded' errors, particularly within the UI's overflow handling. The changes focus on stabilizing component rendering by batching state updates and refining side effect management, leading to a more robust and predictable user interface. Highlights
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Code Review
This pull request introduces defensive coding to prevent "Maximum update depth exceeded" errors in React, which can occur from layout-dependent state changes. The main change in OverflowContext.tsx implements a state update batching mechanism using setTimeout to break synchronous render loops, which is a robust way to handle layout oscillation. The related modifications in MaxSizedBox.tsx and its test file are appropriate and necessary to support this new asynchronous behavior. Overall, the changes are well-implemented and improve the stability of the UI components.
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Size Change: +682 B (0%) Total Size: 25.8 MB ℹ️ View Unchanged
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this is acceptable as there is no need to immediately show the UI that boxes are overflowing. Showing the UI a couple ms or even 50 ms later would be just as good.
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Summary
Fixes #20939
with defensive coding. We're getting user reports from this in google3 but don't have a repro so resorting to defensive coding for this. Strangely no external users appear to be reporting it.
OverflowContextto implement a batched state update mechanism usinguseRefandsetTimeout(0), effectively breaking synchronous update loops and preventing infinite render cycles that could lead to 'Maximum update depth exceeded' errors.useEffectmanagement: SeparateduseEffecthooks inMaxSizedBoxto better manage side effects, ensuring cleanup logic is distinct from state update logic, which contributes to more stable component behavior.MaxSizedBox.test.tsxto correctly handle asynchronous state updates in tests by integratingactand fake timers, ensuring that all React updates are flushed before assertions are made.