Built-in APIs

Utility functions exported from the react package.

Official docs

Full reference: react.dev/reference/react/apis

Common APIs

API	Purpose
memo	Skip re-render if props unchanged
lazy	Code-split component loading
cache	Cache function results across renders
startTransition	Mark updates as transitions
use	Read resources in render (promises, context)

Example: lazy + Suspense

import { lazy, Suspense } from 'react';

const Chart = lazy(() => import('./Chart'));

function Dashboard() {
  return (
    <Suspense fallback="Loading chart...">
      <Chart />
    </Suspense>
  );
}

Upstream Links

• cache
• memo
• lazy