Function updateCallback

docs/external/js/react-dom.development.js:15555–15572

(callback, deps)

  }

  function updateCallback(callback, deps) {
    var hook = updateWorkInProgressHook();
    var nextDeps = deps === undefined ? null : deps;
    var prevState = hook.memoizedState;

    if (prevState !== null) {
      if (nextDeps !== null) {
        var prevDeps = prevState[1];

        if (areHookInputsEqual(nextDeps, prevDeps)) {
          return prevState[0];
        }
      }
    }

    hook.memoizedState = [callback, nextDeps];
    return callback;
  }

  function mountMemo(nextCreate, deps) {
    var hook = mountWorkInProgressHook();