error.todo-preserve-memo-deps-mixed-optional-nonoptional-property-chain.js — react Source File

Source Code

// @enablePreserveExistingMemoizationGuarantees @validatePreserveExistingMemoizationGuarantees @enableOptionalDependencies @enableTreatFunctionDepsAsConditional:false

import {useMemo} from 'react';
import {identity, ValidateMemoization} from 'shared-runtime';

function Component({x}) {
  const object = useMemo(() => {
    return identity({
      callback: () => {
        // This is a bug in our dependency inference: we stop capturing dependencies
        // after x.a.b?.c. But what this dependency is telling us is that if `x.a.b`
        // was non-nullish, then we can access `.c.d?.e`. Thus we should take the
        // full property chain, exactly as-is with optionals/non-optionals, as a
        // dependency
        return identity(x.a.b?.c.d?.e);
      },
    });
  }, [x.a.b?.c.d?.e]);
  const result = useMemo(() => {
    return [object.callback()];
  }, [object]);
  return <Inner x={x} result={result} />;
}

function Inner({x, result}) {
  'use no memo';
  return <ValidateMemoization inputs={[x.y.z]} output={result} />;
}

export const FIXTURE_ENTRYPOINT = {
  fn: Component,
  params: [{x: {y: {z: 42}}}],
  sequentialRenders: [
    {x: {y: {z: 42}}},
    {x: {y: {z: 42}}},
    {x: {y: {z: 3.14}}},
    {x: {y: {z: 42}}},
    {x: {y: {z: 3.14}}},
    {x: {y: {z: 42}}},
  ],
};