Component() — react Function Reference

Source Code

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/useMemo-mabye-modified-free-variable-preserve-memoization-guarantees.js lines 5–28

function Component(props) {
  // With the feature enabled these variables are inferred as frozen as of
  // the useMemo call
  const free = makeObject_Primitives();
  const free2 = makeObject_Primitives();
  const part = free2.part;

  // Thus their mutable range ends prior to this hook call, and both the above
  // values and the useMemo block value can be memoized
  useHook();

  const object = useMemo(() => {
    const x = makeObject_Primitives();
    x.value = props.value;
    mutate(x, free, part);
    return x;
  }, [props.value, free, part]);

  // These calls should be inferred as non-mutating due to the above freeze inference
  identity(free);
  identity(part);

  return object;
}