React 工作标签

导出些常量，工作标签。

export const FunctionComponent = 0;
export const ClassComponent = 1;
// Root of a host tree. Could be nested inside another node.
// 宿主树的根节点。可以嵌套在其他节点中。
export const HostRoot = 3;
// A subtree. Could be an entry point to a different renderer.
// 一个子树。可能是通向不同渲染器的入口点。
export const HostPortal = 4;
export const HostComponent = 5;
export const HostText = 6;
export const Fragment = 7;
export const Mode = 8;
export const ContextConsumer = 9;
export const ContextProvider = 10;
export const ForwardRef = 11;
export const Profiler = 12;
export const SuspenseComponent = 13;
export const MemoComponent = 14;
export const SimpleMemoComponent = 15;
export const LazyComponent = 16;
export const IncompleteClassComponent = 17;
export const DehydratedFragment = 18;
export const SuspenseListComponent = 19;
export const ScopeComponent = 21;
export const OffscreenComponent = 22;
export const LegacyHiddenComponent = 23;
export const CacheComponent = 24;
export const TracingMarkerComponent = 25;
export const HostHoistable = 26;
export const HostSingleton = 27;
export const IncompleteFunctionComponent = 28;
export const Throw = 29;
export const ViewTransitionComponent = 30;
export const ActivityComponent = 31;