TanStack Table Files

Patch Changes

• #6532 ff43666 - Centralize state updates behind a setStateSlice util with an optional structural no-op policy. Equality-guarded slices give their state owner a functional updater that resolves against the owner's latest value and returns the existing reference when nothing changed. Atom and framework state owners can then skip the write and re-render without comparing against a potentially stale controlled table snapshot.

  This removes an entire class of render loops where an auto reset (for example autoResetExpanded after a data reference change) fired a change handler with a freshly allocated but semantically identical value, causing controlled-state consumers to re-render, produce a new data reference, and loop.

  Behavior notes:

  • A custom onXChange handler is still invoked for an apparent no-op. Only its state container knows the latest queued value, so it performs the equality check when it applies the guarded updater. This preserves same-tick update composition in frameworks such as React.
  • State updaters are evaluated once, by the state owner. Controlled fallback atoms therefore remain correct if control is later released, and external atom owners do not run functional updaters twice.
  • stateSlicesEqual compares enumerable string and symbol keys through the three container levels used by stock state. Sparse arrays remain distinct from explicit undefined entries; deeper or non-plain values compare by reference and safely allow the update.
  • Structural equality is opt-in per slice. Opaque globalFilter values and row-scaled rowSelection/rowPinning maps stay direct. The high-frequency columnSizing, columnResizing, and ordinary cell-selection write paths also avoid a comparison on every pointer update.
  • Auto-reset-prone cell selection applies equality specifically to resets, while its drag handler keeps an O(1) active-focus guard. Expanded state similarly guards reset/auto-reset while ordinary writes stay direct, and toggle-all keeps its explicit O(1) no-op checks.