React exposes a few built-in components that you can use in your JSX.
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.
Your own components
You can alsodefine your own components as JavaScript functions.