Resource Preloading APIs

React 19 adds functions for optimizing resource loading.

Available Functions

import { prefetchDNS, preconnect, preload, preinit } from 'react-dom';

prefetchDNS

Perform DNS resolution early:

function App() {
  prefetchDNS('https://api.example.com');
  prefetchDNS('https://cdn.example.com');