🌐 Frontend & Web

JPMC and Barclays' React Interviews: Race Conditions, AbortControllers, and Other Traps

You're mid-pair-programming at JPMC, fingers flying on a fetch call. Then bam: 'Handle that race condition.' Here's the unvarnished truth on surviving these React rituals.

DevTools Feed Apr 04, 2026 4 min read
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React developer pair-programming API fetch challenge on whiteboard with race condition diagram

⚡ Key Takeaways

  • Master race conditions with useRef requestId or AbortController—interview staples at JPMC and Barclays. 𝕏
  • Combine states into one object or extract to custom hooks for cleaner, scalable code. 𝕏
  • These trivia-heavy interviews lag behind modern tools like React Query; predict AI disruption soon. 𝕏
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#AbortController #JPMC Barclays coding challenges #React interviews #race conditions

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Originally reported by dev.to

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