useFoo() — react Function Reference

Source Code

compiler/packages/babel-plugin-react-compiler/src/__tests__/fixtures/compiler/propagate-scope-deps-hir-fork/infer-non-null-destructure.ts lines 4–18

function useFoo({arg, cond}: {arg: number; cond: boolean}) {
  const maybeObj = useIdentity({value: arg});
  const {value} = maybeObj;
  useIdentity(null);
  /**
   * maybeObj.value should be inferred as the dependency of this scope
   * since we know that maybeObj is safe to read from (i.e. non-null)
   * due to the above destructuring instruction
   */
  const arr = [];
  if (cond) {
    arr.push(identity(maybeObj.value));
  }
  return {arr, value};
}