Function mountRef

docs/external/js/react-dom.development.js:15410–15422

(initialValue)

  }

  function mountRef(initialValue) {
    var hook = mountWorkInProgressHook();
    var ref = {
      current: initialValue
    };

    {
      Object.seal(ref);
    }

    hook.memoizedState = ref;
    return ref;
  }

  function updateRef(initialValue) {
    var hook = updateWorkInProgressHook();