React DOM API

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API

这些 API 可以在你的组件中导入，但是很少使用：

• createPortal 允许你将子组件渲染到 DOM 树的不同位置。
• flushSync 允许你强制 React 同步刷新状态并更新 DOM。

Resource Preloading APIs

These APIs can be used to make apps faster by pre-loading resources such as scripts, stylesheets, and fonts as soon as you know you need them, for example before navigating to another page where the resources will be used.

React-based frameworks frequently handle resource loading for you, so you might not have to call these APIs yourself. Consult your framework’s documentation for details.

• prefetchDNS lets you prefetch the IP address of a DNS domain name that you expect to connect to.
• preconnect lets you connect to a server you expect to request resources from, even if you don’t know what resources you’ll need yet.
• preload lets you fetch a stylesheet, font, image, or external script that you expect to use.
• preloadModule lets you fetch an ESM module that you expect to use.
• preinit lets you fetch and evaluate an external script or fetch and insert a stylesheet.
• preinitModule lets you fetch and evaluate an ESM module.

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入口

react-dom 包提供了两个额外的入口：

• react-dom/client 包含在客户端（在浏览器中）渲染 React 组件的 API。
• react-dom/server 包含在服务器上渲染 React 组件的 API。

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已移除的 API

这些 API 将在 React 19 中被移除。

• findDOMNode: 查看 替代方案。
• hydrate: 使用 hydrateRoot 来替代。
• render: 使用 createRoot 来替代。
• unmountComponentAtNode: 使用 root.unmount() 来替代。
• renderToNodeStream: 使用 react-dom/server API 来替代。
• renderToStaticNodeStream: 使用 react-dom/server API 来替代。