Issues

• isEqual in useSWRHandler reads returnedData before it is declared (ReferenceError: Cannot access '…' before initialization)

  vercel/swr#4379 · Filter by author Yahyaali1 opened on Nov 4, 2026 · Updated on Nov 4, 2026

• mutate() and the deduping interval

  area: mutation
  vercel/swr#1417 · Filter by author hazae41 opened on Aug 31, 2021 · Updated on Nov 4, 2026
  18

• cache.get() not working with fallback

  vercel/swr#4175 · Filter by author Gregoirevda opened on Oct 1, 2025 · Updated on Nov 2, 2026
  2

• INITIAL_CACHE lookup uses 'in' on a plain object, so keys like 'toString' resolve to Object.prototype

  vercel/swr#4376 · Filter by author Gruya13 opened on Nov 2, 2026 · Updated on Nov 2, 2026
  1

• INITIAL_CACHE is module-global, so server snapshots leak between cache instances

  vercel/swr#4375 · Filter by author Gruya13 opened on Nov 2, 2026 · Updated on Nov 2, 2026

• Raw string keys can collide with array/object keys (cache aliasing), not fixed by #4370

  vercel/swr#4371 · Filter by author Jeg4nX19 opened on Oct 28, 2026 · Updated on Oct 29, 2026
  1