Built-in React ComponentsLink for this heading

React exposes a few built-in components that you can use in your JSX.

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Built-in componentsLink for Built-in components

• <Fragment>, alternatively written as <>...</>, lets you group multiple JSX nodes together.
• <Profiler> lets you measure rendering performance of a React tree programmatically.
• <Suspense> lets you display a fallback while the child components are loading.
• <StrictMode> enables extra development-only checks that help you find bugs early.

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Your own componentsLink for Your own components

You can also define your own components as JavaScript functions.

PrevioususeTransition

Next<Fragment> (<>)

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React

v19

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Reference

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• react@19

• Overview
• Hooks
  • useActionState
  • useCallback
  • useContext
  • useDebugValue
  • useDeferredValue
  • useEffect
  • useId
  • useImperativeHandle
  • useInsertionEffect
  • useLayoutEffect
  • useMemo
  • useOptimistic
  • useReducer
  • useRef
  • useState
  • useSyncExternalStore
  • useTransition
• Components
  • <Fragment> (<>)
  • <Profiler>
  • <StrictMode>
  • <Suspense>
• APIs
  • act
  • cache
  • createContext
  • lazy
  • memo
  • startTransition
  • use
  • experimental_taintObjectReference
  • experimental_taintUniqueValue

• react-dom@19

• Hooks
  • useFormStatus
• Components
  • Common (e.g. <div>)
  • <form>
  • <input>
  • <option>
  • <progress>
  • <select>
  • <textarea>
  • <link>
  • <meta>
  • <script>
  • <style>
  • <title>
• APIs
  • createPortal
  • flushSync
  • preconnect
  • prefetchDNS
  • preinit
  • preinitModule
  • preload
  • preloadModule
• Client APIs
  • createRoot
  • hydrateRoot
• Server APIs
  • renderToPipeableStream
  • renderToReadableStream
  • renderToStaticMarkup
  • renderToString
• Static APIs
  • prerender
  • prerenderToNodeStream

• Rules of React

• Overview
  • Components and Hooks must be pure
  • React calls Components and Hooks
  • Rules of Hooks

• React Server Components

• Server Components
• Server Functions
• Directives
  • 'use client'
  • 'use server'

• Legacy APIs

• Legacy React APIs
  • Children
  • cloneElement
  • Component
  • createElement
  • createRef
  • forwardRef
  • isValidElement
  • PureComponent

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