React 内部分享（服务器）

export type SharedStateServer = {
  // 用于 Hooks 的 ReactCurrentDispatcher
  H: null | Dispatcher; // ReactCurrentDispatcher for Hooks
  // 用于 Cache 的 ReactCurrentCache
  A: null | AsyncDispatcher; // ReactCurrentCache for Cache

  // enableTaint
  // 启用污点
  TaintRegistryObjects: WeakMap<Reference, string>;
  TaintRegistryValues: Map<string | bigint, TaintEntry>;
  TaintRegistryByteLengths: Set<number>;
  TaintRegistryPendingRequests: Set<RequestCleanupQueue>;

  // DEV-only
  // 仅开发用

  // ReactDebugCurrentFrame
  // React 调试当前帧
  getCurrentStack: null | (() => string);

  // ReactOwnerStackReset
  // React所有者堆栈重置
  recentlyCreatedOwnerStacks: 0;
};

// export type RendererTask = boolean => RendererTask | null;
export type RendererTask = (a: boolean) => RendererTask | null;

const ReactSharedInternals: SharedStateServer = {
  H: null,
  A: null,
} as any;

if (enableTaint) {
  ReactSharedInternals.TaintRegistryObjects = TaintRegistryObjects;
  ReactSharedInternals.TaintRegistryValues = TaintRegistryValues;
  ReactSharedInternals.TaintRegistryByteLengths = TaintRegistryByteLengths;
  ReactSharedInternals.TaintRegistryPendingRequests =
    TaintRegistryPendingRequests;
}

if (__DEV__) {
  // Stack implementation injected by the current renderer.
  // 当前渲染器注入的堆栈实现。
  ReactSharedInternals.getCurrentStack = null as null | (() => string);
  ReactSharedInternals.recentlyCreatedOwnerStacks = 0;
}

export default ReactSharedInternals;