Function mountCallback

docs/external/js/react-dom.development.js:15548–15553

(callback, deps)

  var updateDebugValue = mountDebugValue;

  function mountCallback(callback, deps) {
    var hook = mountWorkInProgressHook();
    var nextDeps = deps === undefined ? null : deps;
    hook.memoizedState = [callback, nextDeps];
    return callback;
  }

  function updateCallback(callback, deps) {
    var hook = updateWorkInProgressHook();