Fix #476: Resolve React 19 stack overflow caused by deepmerging children props #485
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added 9 commits
June 2, 2025 08:34
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Any updates to this PR? I used this with an older version, we're migrating to the Next 15, so it would benefit us really much? I am more than happy to help with anything needed. |
which-sam
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Oct 30, 2025
- Add safeArrayMerge and safeMergeOptions to prevent circular references - Update Store.jsx to use safeMergeOptions in deepMerge operations - Fix WithStore.jsx to separate children props to avoid React 19 warnings - Enhance Slider.jsx prop filtering to prevent DOM attribute warnings - Update objectMerge.js to support custom merge functions and array merging - Add comprehensive tests for safe merge functionality Resolves React 19 stack overflow issues caused by deepmerging children props. Implements changes from express-labs#485 for full React 19 support. BREAKING CHANGE: None - maintains backward compatibility with React 15-18
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What:
Fix stack overflow error in React 19 caused by deepmerge attempting to merge children props. Fixes: #476
Why:
The library was crashing with "RangeError: Maximum call stack size exceeded" when used with Next.js 15 and React 19. This occurred because the
WithStoreHOC was trying to deepmergethis.props.children, which contains React elements with circular references that cause infinite recursion during the merge process.How:
Modified the
render()method inWithStore.jsxto extractchildrenfrom props before passing the remaining props todeepMerge. The children are then passed directly to the wrapped component, avoiding the circular reference issue while maintaining the same functionality.Checklist: