<Profiler> lets you measure rendering performance of a React tree programmatically.
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Built-in React Components – 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. <span><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 com Summary
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